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Tytuł:
Impact of Activator Content on the Process of Photodegradation of PP Non-Wovens
Wpływ udziału aktywatora na proces fotodegradacji włóknin z PP
Autorzy:
Mielicka, Elżbieta
Witkowska, Beata
Puchowicz, Dorota
Kamińska, Irena
Powiązania:
https://bibliotekanauki.pl/articles/1419660.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
photodegradation
polypropylene nonwoven
polypropylene
PP
activator
fotodegradacja
włóknina polipropylenowa
polipropylen
aktywator
Opis:
The paper presents the test results of non-wovens modified by an activator in different concentrations, produced by the spun bonding method. The aim of the research was to assess the photodegradation process of modified PP non-wovens in dependence on the selected concentration of the modifying agent in the fibre mass and the possibility of introducing a new range of PP non-wovens in agriculture. Non-wovens having a mass per unit area of 100 g/m2 were exposed to sunlight during its highest intensity for a period of four months, and UV irradiance was tested in a xenon lamp with radiation doses corresponding to exposure to sunlight. The samples were exposed to the same energy value of visible and UV radiation in a given series of exposure. For the variants of non-wovens tested, the tensile strength and mass per unit area were tested and the surface topography of the non-wovens analysed. Microscopic analysis of fibre damage in the modified non-wovens was carried out after different degrees of exposure to light. It was observed that PP non-woven samples exposed outdoors degraded more intensively than those tested in the Xenotest.
Praca przedstawia wyniki badań włóknin, modyfikowanych aktywatorem o różnym stężeniu, wytworzonych metodą spun bonded. Włókniny o masie powierzchniowej 100 g/m2 poddano ekspozycji na światło słoneczne w okresie największego natężenia słońca przez okres czterech miesięcy. Równolegle prowadzono badania natężenia promieniowania UV w lampie xenonowej. Próbki otrzymały jednakową wartość energii promieniowania widzialnego i UV w danej serii naświetlania. Dla badanych wariantów włóknin wykonano badania wytrzymałości na rozciąganie, masy powierzchniowej oraz dokonano analizy topografii powierzchni włóknin. Przeprowadzono analizę mikroskopową uszkodzeń włókien modyfikowanej włókniny po różnym stopniu naświetlenia.
Źródło:
Fibres & Textiles in Eastern Europe; 2021, 3 (147); 47-59
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wpływu czasu sezonowania folii polipropylenowej na jej właściwości
Study of the effect of seasoning time on the polypropylene film properties
Autorzy:
Gurdzińska, E.
Makomaski, G.
Zieliński, J.
Liszyńska, B.
Brzozowska, T.
Powiązania:
https://bibliotekanauki.pl/articles/278532.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
polipropylen
folia polipropylenowa
dodatki modyfikujące
starzenie
polypropylene
polypropylene film
modifying additives
ageing
Opis:
Przedstawiono wyniki badań dotyczące wpływu czasu sezonowania na wybrane właściwości folii polipropylenowej orientowanej dwuosiowo. Próbki folii pobrane z dwóch różnych partii produkcyjnych, odznaczały się tym samym składem recepturowym i grubością. Próbki były przechowywane w warunkach magazynowych. Właściwości optyczne i mechaniczne folii oznaczono bezpośrednio po jej wyprodukowaniu oraz po 3, 14, 28 i 56 dobach sezonowania.
The results of studies of the effect of seasoning time on the select properties of biaxal oriented polypropylene film were presented. The films samples, characterized by the same prescription compositions and thickness were taken from two different production batch. The samples were stored in a warehouse conditions. Optical and mechanical properties of films were determined directly after their production and after 3, 14, 28 and 56 seasoning days. The effect of seasoning time of films in a warehouse conditions on their properties was evaluated.
Źródło:
Przetwórstwo Tworzyw; 2015, T. 21, Nr 2 (164), 2 (164); 104-107
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Interaction Among Microalgae Spirulina sp, Plastics Polyethylene Terephthalate and Polypropylene in Freshwater Environment
Autorzy:
Khoironi, Adian
Anggoro, Sutrisno
Sudarno, -
Powiązania:
https://bibliotekanauki.pl/articles/952383.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
plastic
polypropylene
polyethylene terephthalate
Spirulina
Opis:
The annual plastic production in Indonesia has exceeded 4.6 million tons and accumulated in the aquatic system. Polyethylene terephthalate (PET) and Polypropylene (PP) are the most widely used plastics in manufacture of packaging, fibres, and drinking bottles, etc. The degradation of these plastics to micro sizes leads to environmental threats, especially when the micro plastics interact with fresh water microorganism such as microalgae. Therefore, the study on the interaction between micro plastics and microorganisms is really important. The aim of this study was to evaluate the impact of microplastics on the growth of microalgae Spirulina sp and also to evaluate the contribution of microalgae Spirulina sp to the plastic degradation. The interaction between microalgae and microplastics was evaluated in a 1 L glass bioreactor contained microalgae Spirulina sp and PP and PET microplastics with the size of 1 mm at various concentrations (150 mg/500 mL, 250/500 mL and 275 mg/500 mL) for 112 days. The results showed that the tensile strength of micro plastic PET decreased by 0.9939 MPa/day while PP decreased by 0.1977 MPa/day. The EDX analysis of microplastics showed that the decreasing carbon in PET (48.61%) was higher as compared to PP (36.7%). FTIR analysis of Spirulina sp cells showed that the CO2 evolution of cells imposed by PET microplastic was higher than imposed by PP. The growth rate of Spirulina sp applied by micro plastic was lower than the control and the increase of microplastic concentration significantly reduced the growth rate of algae by 75%. This research concluded that biodegradation has important role in the degradation process of plastic.
Źródło:
Journal of Ecological Engineering; 2019, 20, 6; 161-173
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of polypropylene foil cutting process using fiber Nb: YAG and Diode Nd:YVO4 lasers
Autorzy:
Kukiełka, Leon
Patyk, Radosław
Bohdal, Łukasz
Napadłek, Wojciech
Gryglicki, Rafał
Kasprzak, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/387021.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
laser
cutting
polypropylene foil
HAZ
Opis:
Lasers are widely used in a variety of manufacturing processes including: depaneling, drilling, cutting, repair, trimming, micromachining. Polypropylene foils are intensively investigated as materials with great number of potential applications. Laser cutting is a major operation used in forming these materials and preparing the final workpieces. At the moment, the main challenge when cutting polypropylene is to obtain high quality products characterized by optimum sheared edge condition, minimum surface damage, freedom from burrs, slivers, edge wave, distortion, residual stresses and to obtain minimum width of HAZ zone. The amount of adjusTab. process parameters and the fact that the influence of these parameters on the process is not fully understood makes it difficult to control the cutting process. In practice, the right setup for the lasers is mostly found by trial and error combined with experience. Therefore, the final product frequently has serious defects. The paper presents the possibility of using fiber and diode lasers for forming of workpieces from polypropylene multilayer foil using cutting technology. The effect of selected process parameters and conditions on quality of sheared edge and material degradation is discussed.
Źródło:
Acta Mechanica et Automatica; 2019, 13, 2; 107-112
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of laser cutting conditions of polypropylene and polypropylene with talc
Autorzy:
Cienka, Agnieszka Edyta
Ciecińska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/2014127.pdf
Data publikacji:
2021
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
laser
material cutting
plastics
polypropylene
Opis:
Laser cutting of materials requires the execution of processing tests and the selection of the most favourable variant from the point of view of the adopted criteria of process quality assessment. This paper presents the example of a preparatory process, which shows that cutting polypropylene and polypropylene with 5 mm thick talc is not an easy process of material handling. A CO2 laser was used and by varying the utilized power from the laser and the beam speed relative to the material, cuts of varying quality were obtained. Criteria were also proposed for the selection of the best processing variant. It was concluded that the addition of talc to polypropylene can be a factor facilitating laser cutting of this material.
Źródło:
Physics for Economy; 2021, 4; 5-15
2544-7742
2544-7750
Pojawia się w:
Physics for Economy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of shredding process parameters and the properties of recyclate
Autorzy:
Głogowska, K.
Rozpędowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/102551.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
injection moulding
polypropylene
shredding
recyclate
Opis:
Shredding is the component of the most important techniques of mechanical recycling of polymeric materials. It is often used as one of the main preparatory processes, associated with the constitution of composite materials. This means that it is a very important and current problem to be solved in terms of technology, design, and economy, as well as environmental protection. A preparation of composite material components by shredding depends specfically on the expected degree of fineness, appropriate size distribution and desired morphology of an elementary particle. The subject of this work concerns mechanical shredding of polymeric materials in various types of mills and agglomerators. The paper presents the tests for verifying the influence of size and shapes of openings in sieves made in the shredder on selected parameters and properties of the obtained recyclate. During the shredding process, the following parameters were analysed: electricity consumption, temperature inside the shredding chamber and the temperature of the obtained recyclate. Selected properties of the obtained recyclate, such as: geometric features of the recyclate dependent on the applied sieves, bulk density and the angle of natural repose were also determined. Mouldings with a gating system, made of polypropylene, were the subject of shredding.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 29; 176-179
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of magnesium hydroxide by modifier-directed hydration and its effect on flame retardancy and mechanical properties of polypropylene
Autorzy:
Wang, Mei Jia
Bai, Li Mei
Zhang, Meng Ting
Ma, Yu Xin
Zhao, Liu Cheng
Li, Shao Ying
Powiązania:
https://bibliotekanauki.pl/articles/27323651.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
modifier
hydration preparation
magnesium hydroxide
polypropylene
Opis:
With the rapid development of the polymer materials industry and the improvement of people's environmental awareness, magnesium hydroxide has been widely used in polymer materials due to its high decomposition temperature, non-toxic smoke suppression, and the advantages of neutralizing harmful gases produced by polymer combustion. However, the conventional preparation methods of magnesium hydroxide exhibit several issues, including high hydrophilicity, elevated polarity, and limited compatibility with polymers. This research proposes an improved method by adding sodium stearate and KH560 modifier, controlling the rate of magnesium oxide and preparing magnesium hydroxide flame retardants using a modifier-directed hydration method. Various characterizations confirmed its morphology, particle size and structure. The magnesium hydroxide exhibits low polarity, small particle size, stable structure and excellent hydrophobicity (with a contact angle of 120.32°, and a free energy of 1.34mN/m). In parallel, the magnesium hydroxide/polypropylene composites demonstrate excellent flame retardancy (LOI of 25%, V-1 grade) and simultaneously enhance the dispersion of magnesium hydroxide within the polypropylene matrix, improving the material's toughness and strength.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 175706
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Composition on Melt Flow and Density of Polypropylene Copolymer/Kaolin Geo-Filler Composites
Autorzy:
Zulkifli, Zulaikha
Daud, Yusrina Mat
Zainal, Farah Farhana
Hashim, Mohammad Firdaus Abu
Aygörmez, Yurdakul
Powiązania:
https://bibliotekanauki.pl/articles/2203755.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
geo-filler
kaolin
composites
polypropylene
rheological
Opis:
This study examined the effects rheological properties of different composition kaolin and kaolin geo-filler in polypropylene composites. Polypropylene composites with varying composition of kaolin geo-filler 0 wt%, 2 wt%, 4 wt%, 6 wt%, 8 wt%, and 10 wt% was prepared and compared with polypropylene composite with raw kaolin. Kaolin is an aluminosilicate based mineral filler was used to prepare geopolymer paste by combining with alkaline activator solution. The polypropylene composite was compounded using a twin-screw extruder and the melt flow index was determined by a constant weight pressure of 2.16 kg at 230°C in 10 min. Knowing the melt flow index is necessary to predict and control the process, the study has demonstrated that the composition of kaolin filler and kaolin geo-filler affects the melt flow, melt density and surface morphology at varies composition. Composites with kaolin geo-filler have demonstrated high melt flow index process and having better distribution and flow.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 369--373
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of tensile performance of concrete by using synthetic polypropylene fibers
Autorzy:
Jienmaneechotchai, Thunyawee
Foytong, Piyawat
Khunkitti, Pirat
Sata, Vanchai
Chindaprasirt, Prinya
Powiązania:
https://bibliotekanauki.pl/articles/36072281.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
polypropylene fibre
modulus of rupture
toughness
Opis:
The research attempted to investigate the effect of polypropylene fibers (PP fibers) on the mechanical characteristics of concrete. According to ASTM C39/C39M and ASTM C 1609/C1609M, standard testing methods were used to examine the concrete compressive and flexural strength, post-cracking behavior, and toughness. The mechanical properties were evaluated at different ages of concrete curing, namely 1 day, 7 days, and 28 days, and for different quantities of fiber volume portions, specifically 0.0%, 0.5%, and 1.0%. The results demonstrate that a fiber volume of 0.5% is the most effective in obtaining the highest compressive strength. The recorded values at the related testing ages were 31.07 MPa, 41.51 MPa, and 46.68 MPa. Additionally, the utilization of 0.5% and 1.0% volume of PP fiber in concrete resulted in improved flexural strength and post-cracking performance. The toughness values for these mixes were 2.0 and 2.6 times higher than those for the plain concrete. Upon analyzing the fracture surface, there was a homogeneous distribution of fibers, which played a significant role in enhancing the overall functionality of the concrete. The research validated that the inclusion of polypropylene fibers substantially enhanced the mechanical characteristics of concrete, emphasizing the potential of fiber reinforcement in concrete-based implementations.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2023, 32, 4; 320-337
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reinforced plastics based on polypropylene and dressed basalt fibers
Napełnianie tworzyw opartych na polipropylenie i włóknach bazaltowych
Autorzy:
Bashtanyk, P.
Kuzmenko, M.
Kuzmenko, S.
Kuzub, I.
Powiązania:
https://bibliotekanauki.pl/articles/278104.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
polypropylene
impregnation
composite
polipropylen
impregnacja
kompozyt
Opis:
The use of [(alkoxy)(acrylatoxy)titanoxy] boranes as dressings for basalt fibers applied as reinforcing fillers in polypropylene has been studied. The [(alkoxy)(acrylatoxy)titanoxy] boranes under study were of different structures and with a varying number of acrylatoxy groups in the molecules of the compounds. It has been shown that the compounds whose molecules have both reactive butoxy and acrylatoxy groups at the titanium atom in an amount of 0.75-1.00 wt. % of the fibrous filler will provide basalt plastics with higher strength properties. Also, the complex-forming atoms (titanium and boron) exhibit an additional network of coordination bonds with the oxygen in the products of polypropylene oxidation. The combination of these two factors enabled obtaining basalt plastics having tensile strength as high as 83.0 MPa.
W pracy badano apreturę włókien bazaltowych, jako napełniacza wzmacniającego polipropylenu. W badaniach wykorzystano [(alkoksy)(akryloksy)tytanoksy] boran, które miały różną strukturę i różną liczbę grup akrylanoksylowych w cząsteczkach związków. Wykazano, że związki, w których cząsteczki miały zarówno butoksylowe i akryloksylowe reaktywne grupy w pobliżu atomu tytanu w ilości od 0,75 do 1,0 % wag. napełniacza włóknistego zapewniają uzyskanie tworzyw bazaltowych o lepszych właściwościach wytrzymałościowych. Ponadto, atomy kompleksotwórcze (tytanu i boru) wykazują dodatkową sieć wiązań koordynacyjnych z tlenem w produktach utleniania polipropylenu. Połączenie tych dwóch czynników powoduje uzyskanie tworzyw bazaltowych mających wytrzymałość na rozciąganie wynoszącą nawet 83,0 MPa.
Źródło:
Przetwórstwo Tworzyw; 2017, T. 23, Nr 2 (176), 2 (176); 93-99
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody rozdrabniania a właściwości termiczne i termo-mechaniczne wyprasek z polipropylenu
Crumbling method vs thermal and thermal-mechanical properties of mouldings made of polypropylene
Autorzy:
Trzaskalska, M.
Grzesiczak, D.
Postawa, P.
Powiązania:
https://bibliotekanauki.pl/articles/278906.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
polipropylen
rozdrabnianie
DMTA
DSC
polypropylene
crumbling
Opis:
W artykule omówiono wpływ sposobu rozdrabniania na właściwości termiczne i termo-mechaniczne wyprasek wtryskowych wytworzonych z polipropylenu. Przemiał uzyskano z wykorzystaniem młyna wolno- i szybkoobrotowego, z którego następnie wytworzono próbki do badań DSC i DMTA. W badaniach DSC stwierdzono, że wypraski wykonane w serii M1 (przemiał z młynka wolnoobrotowego) charakteryzują się wartościami zbliżonymi do wartości uzyskanych dla wyprasek z tworzywa przed przemiałem. W przypadku badań DMTA zauważono, że na skutek rozdrabniania w młynku szybkoobrotowym (seria M2) doszło do rozerwania długich, elastycznych łańcuchów co przyczyniło się do zmniejszenia właściwości tłumiących oraz zwiększenia sztywności.
In the paper were shown the influence of the crumbling method on the thermal and thermal-mechanical properties of mouldings made of polypropylene. Grinded parts were obtained using low and high rotational mill and then which were used, as an injection moulded parts, to DSC and DMTA tests. In DSC studies, it was found that values received for mouldings made in M1 series (grinded parts from low rotational mill) were similar to those obtained for moulded parts made of virgin polypropylene. In DMTA tests, were noted that grinding in high rotational mill (M2 series) leads to break and crush long, flexible chains, which contributed to reduction of dampening properties and increase the stiffness.
Źródło:
Przetwórstwo Tworzyw; 2016, T. 22, Nr 4 (172), 4 (172); 378-383
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reducing Creep Rate of polypropylenes by Soaking Solid solutions of CaCO3
Autorzy:
Hussain, Randa K.
Dagher, Hala F.
Khudadad, Rasol Rahman
Powiązania:
https://bibliotekanauki.pl/articles/1182918.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
creep
polypropylene
calcium carbonate
creep rate
Opis:
The creep behavior of Polypropylene and Polypropylene/Calcium Carbonate were investigated by tested them at different concentration of Calcium carbonate filler (filler addition is done by soaked pp samples in CaCO3 solution) at different temperatures. A dramatically changed in the FTIR was observed when pp soaked in CaCO3 solution comparing with pristine one. It was found that the creep rate was lowered comparing to the pure Polypropylene. The Creep behavior of the polymer formed was observed to increase with increase in temperature and stress, Calcium carbonate enhanced creep rate and rapture time.
Źródło:
World Scientific News; 2016, 49, 2; 90-103
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of polypropylene fiber addition on mechanical properties of concrete based on portland cement
Autorzy:
Małek, M.
Życiński, W.
Jackowski, M.
Wachowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/298035.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
polypropylene fibre
mechanical properties
concrete
Portland cement
Opis:
In this work results of poly(propylene) fibers (PP), from recycling process, added into concrete mixture based on portland cement was characterized. The main purpose of this research was to identify direct influence of the fibers addition on the concrete mechanical strength. The recipe of the concrete was prepared using three types of aggregates with different grain size: 0.125–0.250, 0.250–0.500 and 0.500–1.000 mm, deflocculant based on polycarboxylates, water and portland cement (42.5 MPa). To identify structures of the researched samples and fibers light microscopy (LM) observation was performed. Basic properties of concrete mixture were defined by slump cone test and setting time. Mechanical properties such as compressive strength and bending test after 1, 7, 14 and 28 days were characterized. Obtained results were compared with mixtures without fibers modifications. Study was proven that all chosen fibers from recycled origin revealed increased effect on final mechanical properties of concrete and are very perspective for future application in concrete technology.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2018, 21(3); 207-214
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental investigations of dynamic sorption of diesel from contaminated water
Autorzy:
Paliulis, Dainius
Powiązania:
https://bibliotekanauki.pl/articles/2073786.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wheat
modification
sorption
polypropylene
diesel
surface wastewater
Opis:
Surface wastewater pollution due to accidental runoff or release of oil or its products is a longstanding and common environmental problem. The aim of the study was to investigate the impact of concentrations of oil products (diesel) and suspended solids, the sorbent type, the water flow rate and the interfering factors (chlorides) on the dynamic sorption of diesel and to test regeneration of polypropylene after its use for sorption. The sorbents used for study included common wheat straw (Triticum aestivum), polypropylene and sorbents modified with hydrogen peroxide solution. Standard methods were used for the determination of the investigated parameters and an in-house procedure employing a gas chromatograph was used for the determination of diesel concentration. The following factors that impact the sorption of diesel were investigated during the study: diesel concentration, concentration of suspended solids; type of sorbent (common wheat straw (Triticum aestivum), wheat straw modified with hydrogen peroxide, and polypropylene), water flow rate; and influence of the interfering factors (chlorides). Filtration speed in the range of investigated speeds does not affect the efficiency of diesel removal. Removal efficiency does not depend on the concentration of diesel before the sorbent reaches its maximum sorption capacity. Filling containing 50% of polypropylene and 50% of wheat straw was used for the study. It was found that polypropylene and wheat straw do not remove chlorides and suspended solids from solution. The study found that the solution of hydrogen peroxide boosts the hydrophobic properties of common wheat straw, but does not affect the sorption of diesel. The recommended number of regenerations of polypropylene should be limited to two.
Źródło:
Archives of Environmental Protection; 2021, 47, 4; 30--39
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compatibilisation of PP/PA Blends
Kompatybilizacja stopów mieszanek polipropylenowo-poliamidowych
Autorzy:
Kristofic, M.
Ujhelyiova, A.
Powiązania:
https://bibliotekanauki.pl/articles/232612.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
polypropylene
polyamide
blend
compatibilizer
poliamid
mieszanka
kompatybilizatory
Opis:
Blending polymers is widely used for the preparation of new materials. The disadvantage of this application is that the polymer components are usually not compatible and the preparation of blends with suitable (mainly processing and mechanical) properties is not satisfactory. The use of a third compound, called a compatibiliser, is an effective way to ameliorate the end-use properties of the blend. Compatibilisers based on grafted or block copolymers are often used. The present contribution deals with the compatibilisation of polypropylene/polyamide blends with compatibilisers based on grafted or block polyolefines.
W przypadku kiedy polimery mające ulec zmieszaniu nie są kompatybilne stosuje się środki pomocnicze zwane kompatybilizatorami. Często stosuje się kompatybilizatory oparte na polimerach blokowych lub szczepionych. W artykule omówiono mieszanie polipropylenu z poliamidem z zastosowaniem szczepionych lub blokowych poliolefin.
Źródło:
Fibres & Textiles in Eastern Europe; 2012, 4 (93); 30-36
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation and experimental bending behaviour of multi-layer sandwich structures
Autorzy:
Arbaoui, J.
Schmitt, Y.
Pierrot, J-L.
Royer, F-X.
Powiązania:
https://bibliotekanauki.pl/articles/279468.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
multi-layer sandwich
polypropylene honeycomb
modelling
bending
Opis:
In this paper, an experimental investigation, an analytical analysis and a numerical model of a typical four-point bending test on a polypropylene honeycomb multi-layer sandwich panel are proposed. The polypropylene honeycomb core is modelled as a single solid and multi-layer of equivalent material properties. Analytical and numerical (finite element) homogenization approaches are used to compute the effective properties of the single honeycomb core and analytical homogenization of the multi-layer one. The results obtained by numerical simu- lation (finite element) of four-point bending are compared with the experimental results of a polypropylene honeycomb core/composite facing multi-layer sandwich structures.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 431-442
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ parametrów tolerancji skrętowej na skurcz termiczny polipropylenowej przędzy włókienniczej stosowanej do produkcji tkanin filtracyjnych
The impact of turning on thermal shrinkage of polypropylene textile silk used in the production on filter fabri
Autorzy:
Margol, M.
Kwiatkowski, D.
Wacowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/278693.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
przędza polipropylenowa
przędza włókiennicza
jedwab polipropylenowy
jedwab włókienniczy
włókno polipropylenowe
skurcz termiczny
tkanina filtracyjna
polypropylene yarn
textile yarn
polypropylene silk
textile silk
polypropylene fibre
thermal shrinkage
filter fabric
Opis:
W artykule dokonano oceny wpływu rodzaju skrętu przędzy na jej skurcz termiczny. Przebadano nawoje jedwabiu polipropylenowego o grubości 500 den w czterech postaciach: bez skrętu i o skręcie Z-40, Z-80 i Z-120. Udowodniono, że im skręt przędzy większy tym mniejszy jest jej liniowy skurcz termiczny, co korzystnie wpływa na jakość produkowanych z niej tkanin filtracyjnych.
The article was assessed the impact of the type of yarn turning its on the thermal shrinkage. Polypropylene silk coils tested a thickness of 500 den in four forms: without turning and turning Z-40, Z-80 and Z-120. It has been proved that the higher twist yarn, the smaller is the linear thermal contraction, which reduces the quality of products produced from the filter fabrics.
Źródło:
Przetwórstwo Tworzyw; 2014, [R.] 20, nr 5 (161), 5 (161); 422-426
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Polarization Processes on the Morphology and Photoluminescence Properties of PP/TiO₂ Polymer Nanocomposites
Autorzy:
Ramazanov, M.
Hajiyeva, F.
Maharramov, A.
Hasanova, U.
Ahmadova, A.
Rahimli, A.
Shirinova, H.
Powiązania:
https://bibliotekanauki.pl/articles/1032328.pdf
Data publikacji:
2017-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
photoluminescence
corona discharge
nanocomposites
polypropylene
titanium dioxide
Opis:
The paper reports of synthesis and investigation of polymeric nanocomposites based on isotactic polypropylene and titanium dioxide nanoparticles PP+TiO₂ (PPT). The structure of the PPT nanocomposites was studied by scanning electron and atomic force microscopy. There was also studied the influence of the polarization process by corona discharge on the structure and photoluminescence properties of PPT nanocomposites. It was found that intensity of the photoluminescence after the polarization increases, and this depends on the concentration of titan dioxide nanoparticles in the polymer matrix. It was shown that rms roughness for non-polarized sample compositions is 60-100 nm, whereas for polarized samples after the corona discharge polarization, makes 20-40 nm, i.e. there takes place grinding of the structural elements. It is supposed that, in the composite there forms sufficiently high internal local field, due to the boundary charges, so under the influence of this field there were excited additional luminescent centers, and as a result, after the polarization there was observed the increase of luminescence intensity.
Źródło:
Acta Physica Polonica A; 2017, 131, 6; 1540-1543
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of PP Fabric with Polyols by the Plasma Composite Technique
Autorzy:
Ma, Wen-Xiao
Hu, Bing-Nan
Bai, Yun
Powiązania:
https://bibliotekanauki.pl/articles/2171960.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
polypropylene fabric
polyols
crosslinker
antistatic properties
hydrophilicity
Opis:
In order to endow polypropylene (PP) fabric with hydrophilic and antistatic properties, PP was grafted with polyols (sorbitol, maltitol and polyethylene glycol (PEG)) by the oxygen plasma treatment and subsequent bridging process, where ethylene glycol diglycidyl ether (EGDE) and trimethylolpropanetris (2-methyl-1-aziridinepropionate) (TTMA) were used as crosslinkers. The highest grafting rate was 7.48%. The chemical structure changes were analysed by Fourier transform infrared spectroscopy (FTIR). A scanning electron microscope (SEM) was used to observe the changes in polypropylene fiber surface morphology. The hydrophilicity was characterized by testing loose fiber suspension and moisture retention. The modified PP was more easily immersed in water and the desorption behaviour continued for 2h without equilibrium. The half-life of the grafted PP was reduced to 7s. The results showed that the modified PP with polyols possessed hydrophilicity and antistatic properties.
Źródło:
Fibres & Textiles in Eastern Europe; 2022, 2 (151); 90--98
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermochemical Degradation of Polypropylene: Energy and Exergy Analysis in a Tubular Reactor
Autorzy:
Cruz, Jose Nolasco
Hernández, Irma Pérez
Villalobo, María de Lourdes Castellanos
Henández, Angélica Pérez
Ávila, Juan José López
Powiązania:
https://bibliotekanauki.pl/articles/24201766.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
tubular reactor
exergy
energy
PP
polypropylene
thermal degradation
Opis:
One method to evaluate the energy behavior is energy and exergy analysis. These analyses applied to waste-to-energy conversion technologies provide the information on operating conditions, facilitating energy optimization processes. In this study, an energetic and exergy analysis was used on the thermochemical degradation process of polypropylene in a tubular reactor at 600 °C with a speed of 15 °C min-1. The experimental data used in this work were taken from the study by Parku et al. (2020). According to the results, energy efficiencies of up to 43% and exergy efficiencies of 38% were achieved, and it was also observed, according to what was reported, that the products obtained from pyrolysis contain a high calorific value and can be used as alternative fuels.
Źródło:
Journal of Ecological Engineering; 2023, 24, 5; 14--21
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości przetwórcze kompozytów polipropylenowych modyfikowanych grafitem ekspandowanym
Processing properties of polypropylene composites modified expanded graphite
Autorzy:
Tartakowski, Z.
Lewandowska-Kosyl, J.
Kosyl, M.
Powiązania:
https://bibliotekanauki.pl/articles/278237.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
grafit ekspandowany
polipropylen
kompozyt
expanded graphite
polypropylene
composite
Opis:
W artykule przedstawiono wyniki badań właściwości przetwórczych kompozytów polipropylenowych modyfikowanych grafitem ekspandowanym (PP/EGexp), do zastosowań na wyroby techniczne. Udział napełniacza grafitowego w kompozytach wynosił 1, 2,5 i 5% wag. Analizowano wpływ wielkości cząstek i ich udział wagowy na właściwości przetwórcze wytworzonych kompozytów. Badano stopień wypełnienia gniazda formującego o kształcie spiralnym i wielostopniowym, skurcz wtryskowy przy różnych parametrach przetwórczych (ciśnienie wtryskiwania, temperatura wtryskiwania) oraz masowy wskaźnik szybkości płynięcia materiałów kompozytowych. Stwierdzono, że ilość i wielkość cząstek grafitowych wpływa na zmniejszenie skurczu wtryskowego. Wzrost temperatury przetwórstwa i ciśnienia wtryskiwania, powoduje zwiększenie wypełnienia gniazda formującego. Wykazano również, że poprzez zmianę parametrów przetwórstwa można regulować stopień wypełnienia gniazda formującego. Przeprowadzone badania potwierdziły, możliwość aplikacji materiałów na specjalne wyroby techniczne o złożonej geometrii kształtu.
This paper presents the results of processing properties of polypropylene composites modified expanded graphite (PP / EGexp), which may be used for technical products for special application. The share of graphite filler in composites were 1, 2.5 and 5 wt%. The influence of particle size and the weight fraction on the processing properties of the composites produced has been studied. Materials were tested degree of filling of the cavity in a spiral shape, shrinkage after injection. Also analyzed the degree of filling the mold with the socket in the stepped shape of the product at different processing parameters (injection pressure, injection temperature) and the melt flow rate of composite materials. It was found that the amount and size of graphite particles reduces shrinkage after injection. The increase in processing temperature and injection pressure, increases the filling cavity. It was also shown that by varying the processing parameters can be adjusted by the degree of filling the cavity. The study confirmed the possibility of the application materials for special technical products with complex geometry shape.
Źródło:
Przetwórstwo Tworzyw; 2014, [R.] 20, nr 4 (160), 4 (160); 344-348
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation effects in polypropylene/polystyrene blends as the model of aromatic protection effects
Autorzy:
Głuszewski, W.
Zagórski, Z. P.
Powiązania:
https://bibliotekanauki.pl/articles/147686.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
energy transfer
polypropylene
polystyrene
protection effect
radiation grafting
Opis:
A technically useful composition containing polypropylene (PP) as a principal constituent, expected to be working or to be processed in ionizing radiation field, e.g. for sterilization, has to be protected from undesired radiolysis resulting in radiation damage. Usually, conventional additives are used which are generally effective, especially when containing aromatic groups. They can be sometimes unacceptable, e.g. in medical applications. Polystyrene (PS) has been investigated as a protective component, in analogy to the classical case of cyclohexane/benzene system. Mechanical mixing of both polymers showed to be of modest effect, but two other procedures, of soaking polypropylene powder with polystyrene dissolved in styrene, or soaking with styrene and gamma preirradiation with resulting grafting (G = 12000 effects/100 eV), resulted in the composition of improved resistance towards radiation. The energy transfer, which explains the effect, is extended at a distance of 8-12 mers of polypropylene. The investigations have been made by gas chromatography and diffuse light reflection spectrophotometry (DRS), after 10 MeV electron beam irradiations.
Źródło:
Nukleonika; 2008, 53, suppl. 1; 21-24
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of coupling agent on antioxidant properties and structure of PP/ cotton stalk lignin composites
Autorzy:
He, Mingyu
Musajian, Dilhumar
Hasan, Gvlmira
Hou,, Gongbo
Yimit, Mamatjan
Powiązania:
https://bibliotekanauki.pl/articles/780085.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
polypropylene
coupling agent
cotton stalk lignin
composite material
Opis:
In this paper, the effects of coupling agent and lignin extracted from waste cotton stalks in Xinjiang on thermaloxygen aging properties of polypropylene (PP) composites were studied. The melt index test and indoor thermal oxygen aging test was carried out on the samples treated with coupling agent. The mechanical properties, surface micromorphology, rheological properties and element composition of the materials before and after 30 days of aging were studied. The results showed that the titanate coupling agent was the best for improving the melt index and mechanical properties of PP/cotton stalk lignin composites. After the 30-day thermal oxygen aging test, the samples with 2% lignin had the best impact strength and retention rate of fracture elongation, reaching 68.9% and 77.3% respectively. The sample with 3% lignin content had the smoothen surface, no crack appeared. After aging, the increase of C=O was the least, and the crystal peak area decreased less.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 2; 78-85
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of multiple processing of polypropylene on selected properties of injection moulded parts
Autorzy:
Głogowska, K.
Sikora, J. W.
Dulebová, L.
Powiązania:
https://bibliotekanauki.pl/articles/102128.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
strength test
polypropylene
hardness
impact strength
injection moulding
Opis:
An injection moulding machine was used to produce injection moulded parts from polypropylene under invariant injection moulding conditions. Part of the injection mouldings were shredded and re-processed up to fifteen times. The mouldings and the shredded plastic were tested for selected strength properties: Young’s modulus, maximum tensile stress, breaking stress, strain at maximum stress, strain at break, Shore hardness, impact strength, mass flow rate, and longitudinal and transverse shrinkage. Relevant relationships were identified and conclusions were drawn on the basis of the data obtained.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 65-72
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of particulate fillers on hardness of polymer composite
Autorzy:
Dulebova, L.
Garbacz, T.
Powiązania:
https://bibliotekanauki.pl/articles/102706.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
polypropylene composites
ageing effect
talc filler
chalk filler
Opis:
The analysis of polymeric composites can be quite challenging because the samples are often of complex nature due to the presence of various groups of additives, compounding ingredients, and fillers. In this contribution, changes of hardness of Polypropylene (PP) composites during and after the exposure of materials to UV chamber and low temperatures were investigated. The particulate fillers talc and chalk in weight fraction from 10 to 50% and montmorillonite (MMT) in weight fraction 4% were used as fillers in the polypropylene matrix. The composites were mixed in the extruder while the length, diameter of screw, as well as the number of grooves in the feed zone were changed. The influence of ageing – UV radiation and low temperature was examined by change of Shore hardness after 360h and 720h of exposure. According to the performed tests we can conclude that the tested materials may be exposed to UV radiation and low temperature of -20ºC without significant changes of hardness.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 66-71
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 193

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