Temat: vinyl chloride - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Self-Plasticization of PVC via click reaction of a monooctyl phthalate derivative
Autorzy:: Jia, P.
Wang, R.
Hu, L.
Zhang, M.
Zhou, Y.
Powiązania:: https://bibliotekanauki.pl/articles/779324.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: poly(vinyl chloride)
plasticization
migration
TGA
Opis:: Modified PVC (M-PVC) material with suppressed migration and low glass transition temperature was prepared via click reaction of a monooctyl phthalate derivative. Chemical structure and composition of M-PVC were characterized by FT-IR, 1H NMR and element analysis. Thermal stability, glass transition temperature and migration stability of M-PVC were studied with TGA, DSC and migration tests, respectively. The study showed that M-PVC exhibited poor thermal stability, and low glass transition temperature of 66.0°C. No migration was found in distilled water, 10% (v/v) ethanol, 30% (w/v)acetic acid and petroleum ether. The PVC material is expected to preparing PVC products in the areas with high migration resistance requirement.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 3; 16-19
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Selected physical properties of extruded composites type of porous PVC-metal
Autorzy:: Tor-Świątek, A.
Powiązania:: https://bibliotekanauki.pl/articles/102054.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: poly(vinyl chloride)
extrusion
fillers
metallic powders
Opis:: The article presents studies of selected physical and mechanical properties of hybrid materials type of polymer-metal. In the frame of this work modification of PVC with the iron and copper powder in amount of 0, 1.5 and 3% and blowing agent in amount of 0, 0.5, 1% was done. Extrudates in a form of pipe were tested to determine density, porosity, maximum tensile stress, stress at break, modulus of elasticity and elongation with break. The samples were also observed in a microscope. The studies have shown significant influence of the added components on the properties tested.
Źródło:: Advances in Science and Technology. Research Journal; 2014, 8, 23; 14-18
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Synthesis of a novel environmental friendly plasticizer based on tung oil fatty acid for poly (vinyl chloride) blends
Autorzy:: Tong, H.
Hai, J.
Powiązania:: https://bibliotekanauki.pl/articles/778643.pdf
Data publikacji:: 2018
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: Synthesis
plasticizer
migration resistance
poly (vinyl chloride)
Opis:: A novel environmental friendly plasticizer (TPE) derived from tung oil fatty acid with long fatty acid chain and high degree of branching was synthesized. Chemical structure of the obtained TPE was characterized with Fourier transform infrared spectroscopy (FT-IR) and ¹H NMR. TPE was used to prepare plasticized PVC blends as main plasticizer. Thermal stability, mechanical properties and migration resistance of poly (vinyl chloride) plasticized with TPE were investigated. The results showed that torque data of plasticized PVC blends reached 12.4 N·m when the mass of the TPE was 50 wt.%. TPE improved the thermal stability of PVC blends obviously than dioctyl phthalate (DOP). The leaching tests showed that PVC plasticized with TPE were with higher migration resistance than that of DOP. The excellent thermal stability and high migration resistance of PVC blends showed high application value for TPE.
Źródło:: Polish Journal of Chemical Technology; 2018, 20, 2; 92-97
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Correlation of chromosome damage and promoter methylation status of the DNA repair genes MGMT and hMLH1 in Chinese vinyl chloride monomer (VCM)-exposed workers
Autorzy:: Wu, Fen
Liu, Jing
Qiu, Yu-Lan
Wang, Wei
Zhu, Shou-Min
Sun, Pin
Miao, Wen-Bin
Li, Yong-Liang
Brandt-Rauf, Paul W.
Xia, Zhao-Lin
Powiązania:: https://bibliotekanauki.pl/articles/2179802.pdf
Data publikacji:: 2013-03-01
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: vinyl chloride monomer
chromosome damage
MGMT
hMLH1
DNA methylation
Opis:: Objective: To explore the association of the methylation status of MGMT and hMLH1 with chromosome damage induced by vinyl chloride monomer (VCM). Materials and Methods: Methylation of MGMT and hMLH1 was measured in 101 VCM-exposed workers by methylation-specifi c PCR. Chromosome damage in peripheral blood lymphocytes was measured by the cytokinesis-block micronucleus assay. The subjects were divided into chromosome damaged and non-damaged groups based on the normal reference value of micronuclei frequencies determined for two control groups. Results: MGMT promoter methylation was detectable in 5 out of 49 chromosome damaged subjects, but not in the chromosome non-damaged subjects; there was a signifi cant difference in MGMT methylation between the two groups (p < 0.05). Conclusions: We detected aberrant promoter methylation of MGMT in a small number of chromosome damaged VCM-exposed workers, but not in the chromosome non-damaged subjects. This preliminary observation warrants further investigation in a larger study.
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 173-182
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The Effects of Epoxidized Acrylated Castor Oil (EACO) on Soft Poly (vinyl chloride) Films as a Main Plasticizer
Autorzy:: Song, F.
Xia, H.
Jia, P.
Zhang, M.
Hu, L.
Zhou, Y.
Powiązania:: https://bibliotekanauki.pl/articles/777906.pdf
Data publikacji:: 2018
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: Castor Oil
Poly(vinyl chloride)
Epoxy Plasticizer
Thermal Property
Migration Resistance
Opis:: In this work, an environmentally friendly type plasticizer was introduced. The synthesis consisted of two steps. In the first step, castor oil (CO) was acrylated and then the acrylated castor oil (ACO) was epoxidized with the presence of formic acid and hydrogen peroxide in the second step. The epoxidized acrylated castor oil (EACO) was characterized by FTIR and ¹H-NMR techniques. The EACO was used as a main plasticizer to obtain plasticized PVC materials and compared with DOP. The results showed that EACO improved polyvinyl-chloride (PVC) plasticization performance and reduced Tg from 81.06°C to 1.40°C. Plasticized PVC materials with EACO showed similar mechanical properties and better thermal stability than DOP. EACO had better volatility stabilities, migration and solvent extraction in PVC than DOP. EACO can be used to replace DOP to prepare soft films.
Źródło:: Polish Journal of Chemical Technology; 2018, 20, 4; 13-19
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modification of rigid poly(vinyl chloride) for application in three-layer feed pipes
Modyfikacja nieplastyfikowanego poli(chlorku winylu) do aplikacji w trójwarstwowych rurach paszociągowych
Autorzy:: Lewandowski, Krzysztof
Skórczewska, Katarzyna
Piszczek, Kazimierz
Manikowski, Marek
Mirowski, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/947114.pdf
Data publikacji:: 2020
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: poly(vinyl chloride)
modification
three-layer pipe
poli(chlorek winylu)
modyfikacja
rura trójwarstwowa
Opis:: The purpose of the conducted works was material testing of modified poly(vinyl chloride) intended for use in the production of three-layer transmission pipes used in the construction of feeding systems. The effect of modifier on the mechanical and processing properties of PVC was determined. Plastographometric analysis was performed and basic mechanical properties as well as MFR were determined. A sandwich panel reflecting the cross-section of the wall of the designed pipe was made and characterized. A method of estimating the content of processing additives in PVC mixtures was proposed to obtain the material with the assumed MFR value. It has been found that poly(vinyl chloride) materials of various compositions, as well as their recyclates, can be conveniently combined into durable multilayer structures.
Opracowano sposób modyfikacji poli(chlorku winylu) (PVC) w aspekcie możliwości jego zastosowania w produkcji trójwarstwowych rur przesyłowych wykorzystywanych w konstrukcji paszociągów. Zbadano wpływ dodatku modyfikatorów na właściwości przetwórcze i mechaniczne PVC. Wykonano analizę plastografometryczną, wyznaczono podstawowe właściwości mechaniczne oraz masowy wskaźnik szybkości płynięcia (MFR). Wykonano, a następnie scharakteryzowano płytę warstwową obrazującą przekrój ścianki projektowanej rury. Zaproponowano metodę oszacowania udziału dodatków procesowych w mieszankach PVC, gwarantujących otrzymanie tworzywa o zakładanej wartości MFR. Stwierdzono, że zarówno tworzywa polichlorowinylowe o różnym składzie, jak i ich recyklaty można dogodnie łączyć w trwałe struktury warstwowe.
Źródło:: Polimery; 2020, 65, 4; 304-310
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Effects of preparation methods of mixed calcium and zinc thermal stabilizers derived from dimer fatty acid and tung-oil based C22 triacid on properties of PVC
Autorzy:: Li, M.
Wang, M.
Li, S.
Huang, K.
Mao, W.
Xia, J.
Powiązania:: https://bibliotekanauki.pl/articles/778123.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: poly(vinyl chloride)
mixed calcium and zinc thermal stabilizer
synthesis technology
thermal stabilization
Opis:: Calcium and zinc salts of dimer fatty acids (DFA-Ca and DFA-Zn) were synthesized using direct neutralization and metathesis technologies, respectively. The adduct of maleic anhydride and methyl eleostearate (MAME) was also converted to the corresponding zinc soap (C22TA-Zn) and calcium soap (C22TA-Ca) by the two different synthetic routes. Mixed Ca/Zn salts between DFA-Ca and DFA-Zn, and between C22TA-Zn and C22TA-Ca were used as thermal stabilizers for poly(vinyl chloride) (PVC). The PVC thermal stability was determined using Congo red test, discoloration test, torque rheological analysis and TGA. Dynamic mechanical properties were also tested. Results indicated that the DFA-Ca/DFA-Zn thermal stabilizer from direct neutralization technology was found to be superior to that of the metathesis product. The C22TA-Ca/C22TA-Zn thermal stabilizer from direct neutralization method had overall superior thermal stability, and displayed modulus and glass transition comparable to that of metathesis product. Direct neutralization method was more excellent and convenient than metathesis technology.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 2; 78-87
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Formation of environmentally friendly chloroorganic compounds technology by sewage and by-products utilization
Autorzy:: Myszkowski, J.
Milchert, E.
Paździoch, W.
Pełech, R.
Powiązania:: https://bibliotekanauki.pl/articles/778194.pdf
Data publikacji:: 2007
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: recykling
związki chloroorganiczne
chlorek winylu
tlenek propylenu
recycling
chloroorganic compounds
vinyl chloride
propylene oxide
Opis:: The processes presented in the study enables the separation and disposal of the chloroorganic compounds as by-products from the vinyl chloride plant by using the dichlorethane method and also from the production of propylene oxide by the chlorohydrine method. The integrated purification method of steam stripping and adsorption onto activated carbon allows a complete removal and recovery of the chloroorganic compounds from waste water. Waste distillation fraction is formed during the production of vinyl chloride. 1,1,2-trichloroethane separated from the above fraction, can be processed to vinylidene chloride and further to 1,1,1-trichloroethane. 2,3-Dichloropropene, 2-chloroallyl alcohol, 2-chloroallylamine, 2-chlorothioallyl alcohol or bis(2-chloroallylamine) can be obtained from 1,2,3-trichloropropane. In the propylene oxide plant the waste 1,2-dichloropropane is formed, which can be ammonolysed to 1,2-diaminopropane or used for the production of β-methyltaurine. Other chloroorganic compounds are subjected to chlorinolysis which results in the following compounds: perchloroethylene, tetrachloromethane, hexachloroethane, haxachlorobutadiene and hexachlorobenzene. The substitution of the milk of lime by the soda lye solution during the saponification of chlorohydrine eliminates the formation of the CaCl2 waste.
Źródło:: Polish Journal of Chemical Technology; 2007, 9, 3; 118-121
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Influence of the coating process parameters on the quality of PUR/PVP hydrogel coatings for PVC medical devices
Autorzy:: Paradowska, A.
Kaźmierska, K.
Ciach, T.
Powiązania:: https://bibliotekanauki.pl/articles/779563.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: poliwinylopirolidon
powłoka hydrożelowa
metoda zanurzeniowa
poli(chlorek winylu)
Hydrogel coatings
dip-coating
poly(vinyl chloride)
polyvinylpyrrolidone
Opis:: To decrease friction factor and enhance the biocompatibility of medical devices manufactured from poly(vinyl chloride), PVC, the surface modification with wear resistant polyurethane/polyvinylpyrrolidone (PUR/PVP) hydrogel coating can be applied. In the present work substrates were dip-coated with PVP and PUR solutions and thermally cured. The variable process parameters were: solvent system; concentration of polymers (1, 2 or 3% w/v); coating baths temperature (22, 38 and 55°C); drying temperature (32, 50 and 67°C); length of break between process steps (5, 30 and 90 s); and solutions storage time (up to 72 hrs). The quality of coatings was determined by friction coefficients against porcine aorta, weights of the deposited layer and the swelling capacity. The solvent system and polymers concentration were crucial factors. The increased temperature of coating solutions caused increased deposition but decreased durability. The most lubricious samples were dried in 50oC. Coatings from the solutions prepared 24h prior to use had better properties than those from fresh solutions.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 2; 38-45
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Aminated PVC cross-linked with 2,2’-dichlorodiethyl ether as heavy metal absorber
Aminowany PVC sieciowany za pomocą eteru 2,2’-dichlorodietylowego jako absorber metali ciężkich
Autorzy:: Mabrouki, Adnen
Bouzayene, Faycel
Awatef, Soltani
Ammari, Fayçel
Powiązania:: https://bibliotekanauki.pl/articles/2202595.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: poly(vinyl chloride)
metal extraction
diethylenetriamine
dichlorodiethyl ether
poli(chlorek winylu)
ekstrakcja metali
dietylenotriamina
eter dichlorodietylowy
Opis:: The paper describes the chemical modification of PVC consisting in the introduction of amino groups (1,4-dioxane, diethylenetriamine), and then cross-linking with dichlorodiethyl ether. The optimal extraction time was obtained for the polymer that had more chlorine atoms substituted with diethylenetriamine groups and ether. The obtained polymers were characterized by infrared spectroscopy (FTIR), elemental analysis (CHN) and differential thermal analysis (DTA).
W pracy opisano chemiczną modyfikację PVC polegającą na wprowadzeniu grup aminowych (1,4-dioksan, dietylenotriamina), a następnie sieciowaniu eterem dichlorodietylowym. Optymalny czas ekstrakcji uzyskano w przypadku polimeru, który miał więcej atomów chloru podstawionych grupami dietylenotriaminowymi i eterem. Otrzymane polimery scharakteryzowano za pomocą spektroskopii w podczerwieni (FTIR), analizy elementarnej (CHN) oraz różnicowej analizy termicznej (DTA).
Źródło:: Polimery; 2022, 67, 11-12; 602--608
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Sequence-specific p53 gene damage by chloroacetaldehyde and its repair kinetics in Escherichia coli
Autorzy:: Kowalczyk, Paweł
Cieśla, Jarosław
Saparbaev, Murat
Laval, Jacques
Tudek, Barbara
Powiązania:: https://bibliotekanauki.pl/articles/1041247.pdf
Data publikacji:: 2006
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: chloroacetaldehyde
p53
replication
exocyclic DNA adducts
vinyl chloride
LM-PCR
DNA repair
sequence-specific DNA damage
Opis:: Oxidative stress and certain environmental carcinogens, e.g. vinyl chloride and its metabolite chloroacetaldehyde (CAA), introduce promutagenic exocyclic adducts into DNA, among them 1,N6-ethenoadenine (εA), 3,N4-ethenocytosine (εC) and N2,3-ethenoguanine (εG). We studied sequence-specific interaction of the vinyl-chloride metabolite CAA with human p53 gene exons 5-8, using DNA Polymerase Fingerprint Analysis (DPFA), and identified sites of the highest sensitivity. CAA-induced DNA damage was more extensive in p53 regions which revealed secondary structure perturbations, and were localized in regions of mutation hot-spots. These perturbations inhibited DNA synthesis on undamaged template. We also studied the repair kinetics of CAA-induced DNA lesions in E. coli at nucleotide resolution level. A plasmid bearing full length cDNA of human p53 gene was modified in vitro with 360 mM CAA and transformed into E. coli DH5α strain, in which the adaptive response system had been induced by MMS treatment before the cells were made competent. Following transformation, plasmids were re-isolated from transformed cultures 35, 40, 50 min and 1-24 h after transformation, and further subjected to LM-PCR, using ANPG, MUG and Fpg glycosylases to identify the sites of DNA damage. In adaptive response-induced E. coli cells the majority of DNA lesions recognized by ANPG glycosylase were removed from plasmid DNA within 35 min, while MUG glycosylase excised base modifications only within 50 min, both in a sequence-dependent manner. In non-adapted cells resolution of plasmid topological forms was perturbed, suggesting inhibition of one or more bacterial topoisomerases by unrepaired ε-adducts. We also observed delayed consequences of DNA modification with CAA, manifesting as secondary DNA breaks, which appeared 3 h after transformation of damaged DNA into E. coli, and were repaired after 24 h.
Źródło:: Acta Biochimica Polonica; 2006, 53, 2; 337-347
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Innovative hybrid polymer composites cellular polymer-metal powder obtained in extrusion process
Autorzy:: Tor-Świątek, A.
Powiązania:: https://bibliotekanauki.pl/articles/105696.pdf
Data publikacji:: 2015
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Tematy:: extrusion
poly(vinyl chloride)
blowing agent
metal powder
composite
wyciskanie
poli(chlorek winylu)
środek porujący
proszek metalu
kompozyt
Opis:: Polymer matrix composites used for different cable coatings or pipes, are fabricated from materials containing various kinds of powder fillers or fibrous. Properties and structure of these materials depend on the type of added ingredients, their miscibility and quantity. Proper processing method also plays an important role, which allows for obtaining products of homogeneous reproducible properties. The composition was prepared by extrusion with changed processing parameters according to solid plastics. The roughness of obtained shapes was measured with the use of linear method. Results shows that adding blowing agent has a significant influence on mechanical properties.
Źródło:: Acta Innovations; 2015, 17; 12-21
2300-5599
Pojawia się w:: Acta Innovations
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Effect of calcinated halloysite on structure and properties of rigid poly(vinyl chloride) composites
Autorzy:: Wieczorek, Martina
Tomaszewska, Jolanta
Bajda, Tomasz
Długosz, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/2202880.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: polymer composites
mechanical properties
thermal properties
halloysite
poly(vinyl chloride)
kompozyty polimerowe
właściwości mechaniczne
właściwości termiczne
haloizyt
chlorek winylu
Opis:: Halloysite is a filler which may be used to produce composites with thermoplastic polymer matrix. This work summarized the results of investigations of processing, structural, mechanical, and thermal properties of the composites with poly(vinyl chloride) (PVC) matrix and raw halloysite (HA) as well as its calcined product (KHA). The effectiveness of calcination was confirmed with X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption method. The PVC composites with HA as well as KHA were processed in the molten state in the Brabender mixer chamber. The reduction of gelation time and simultaneous increase in maximum torque with filler content were found based on the results of plastographometric analysis. SEM images of PVC/halloysite composites showed a homogeneous distribution of the filler in the polymer matrix. The introduction of halloysite leads to a slight increase in Young’s modulus and tensile strength compared to neat PVC, where the increase of both parameters is greater when KHA is used. The incorporation of 1% KHA led to an increase in impact strength, an effect which may be attributed to toughening of the polymer. A slight improvement of the Vicat softening temperature of 2.7 degrees C for PVC/HA and heat deflection temperature of 2.4 C for PVC/KHA was also ascertained for PVC modified with 10 wt% of filler.
Źródło:: Chemical and Process Engineering; 2022, 43, 3; 383--404
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Involvement of hybrid materials based on natural clay and poly(vinyl chloride) into extraction of metal cations
Wykorzystanie materiałów hybrydowych na bazie modyfikowanego poli(chlorku winylu) napełnionego naturalną glinką w ekstrakcji kationów metali
Autorzy:: Chrayet, B.
Ammari, F.
Meganem, F.
Powiązania:: https://bibliotekanauki.pl/articles/947553.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: modified poly(vinyl chloride)
clay
hybrid material
metal cations
extraction
modyfikowany poli(chlorek winylu)
glinka
materiał hybrydowy
kationy metali
ekstrakcja
Opis:: The solid-liquid extraction is one of the most used methods for protection of the environment against organic and inorganic pollutants. The hybrid materials have been synthesized by a simple method from natural clay and modified poly(vinyl chloride) (PVC). The obtained products were characterized by various techniques, infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). The final materials were successfully used for entrapping heavy metal ions (Fe, Cu, Cd, Zn, Pb, Mn, and Co). The quantities of adsorbed metal cations were determined by atomic absorption analysis. It has been revealed that the metals extraction was governed essentially by the affinity between the functional groups of the hybrid material and the investigated metal ion. The cations are extracted in the following decreasing order of effectiveness: Fe³⁺ > Cu²⁺ > Co²⁺ ≈ Mn²⁺ > Pb²⁺ > Cd²⁺ ≈ Zn²⁺.
Proces ekstrakcji w układzie ciało stałe-ciecz jest najczęściej stosowany w celu ochrony środowiska przed działaniem szkodliwych, organicznych i nieorganicznych zanieczyszczeń. Materiały hybrydowe zsyntetyzowano w prosty sposób z modyfikowanego poli(chlorku winylu) i naturalnej, tunezyjskiej glinki. Otrzymane materiały badano różnymi metodami: spektroskopii w podczerwieni (FT-IR), analizy termograwimetrycznej (TGA) oraz różnicowej analizy termicznej (DTA). Oceniano przydatność otrzymanych materiałów hybrydowych w procesach ekstrakcji kationów metali ciężkich: Fe, Cu, Cd, Zn, Pb, Mn i Co w układzie ciało stałe-ciecz. Ilości zaadsorbowanych kationów oceniano metodą absorpcji atomowej. Wykazano, że ekstrakcja metali jest możliwa dzięki powinowactwu grup funkcyjnych kompozytów hybrydowych z jonami metali. Za pomocą wytworzonych materiałów hybrydowych ekstrahowano badane jony w stopniu określonym następującą kolejnością: Fe³⁺ > Cu²⁺ > Co²⁺ ≈ Mn²⁺ > Pb²⁺ > Cd²⁺ ≈ Zn²⁺.
Źródło:: Polimery; 2017, 62, 3; 187-192
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Poly(vinyl chloride)-supported triazoles grafted onto calix[4]arene for chromium ions extraction
Ekstrakcja jonów chromu z użyciem kaliks[4]arenu modyfikowanego trizolami szczepionego poli(chlorkiem winylu)
Autorzy:: Said, Ammar
Dardouri, Mokhtar
Ammari, Fayçel
Ouerghui, Abid
Power, Nicholas P.
Meganem, Faouzi
Powiązania:: https://bibliotekanauki.pl/articles/2088260.pdf
Data publikacji:: 2021
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: calix[4]arene
poly(vinyl chloride)
triazole
chromium(VI) extraction
kaliks[4]aren
poli(chlorek winylu)
ekstrakcja jonów chromu(VI)
Opis:: A new suitable material was synthesized using click reaction between dialkynyl-p-tert-butylcalix[4]arene and poly(vinyl chloride) azide (PVC-N3 ). This novel dialkynyl-p-tert-butylcalix[4]arene with triazole groups grafted onto PVC polymer (PVC-0.75CX[4]) has an excellent extraction capability for chromium ions from aqueous solutions. It shows a unique ability to extract chromium (VI) ions from aqueous solutions, thanks to the soft cavity, the presence of π-triazole rings and hydrogen bonds. Cr (VI) ion sorption capacity is 95.5% at pH = 3.
W wyniku reakcji typu click między dialkynylo-p-tert-butylokaliks[4]arenem a azydkiem poli(chlorku winylu) (PVC-N3 ) otrzymano nowy związek − dialykynylo-p-tert-butylokaliks[4]aren z grupami triazolowymi szczepiony na poli(chlorku winylu) (PVC-0.75CX[4]). Wykazuje on wyjątkową zdolność do ekstrakcji jonów chromu(VI) z roztworów wodnych, dzięki sprężystej wnęce, obecności pierścieni π-triazolowych i wiązań wodorowych. Zdolność do sorpcji jonów Cr(VI) wynosi 95,5% przy pH = 3.
Źródło:: Polimery; 2021, 66, 11-12; 611--618
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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