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    Wyświetlanie 1-14 z 14
    Tytuł:
    Characterization of TiAlV Films Prepared by Vacuum Arc Deposition: Effect of Substrate Temperature
    Autorzy:
    Abdallah, B.
    Mrad, O.
    Ismail, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400306.pdf
    Data publikacji:
    2013-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    87.85.jf
    Opis:
    Three TiAlV films have been prepared by vacuum arc discharge technique at different substrate temperatures (50, 300, and 400°C). The depositions were carried out from aluminum, vanadium and titanium elemental targets. The temperature effects on the crystalline quality and texture have been investigated by means of X-ray diffraction. Two phases have been identified and the grain size has been found to increase with temperature. The composition of the films has been determined by proton induced X-ray emission technique. The Ti ratio was found to increase with temperature. The microhardness, measured by the Vickers indentation method was found to decrease with temperature. X-ray photoelectron spectroscopy was used to study the chemical composition of the passive layer formed on the films by analyzing high resolution spectra of Al 2p, Ti 2p and V 2p. This layer was mainly composed of $TiO_2$ with a small participation of other oxidation and metallic states of Ti, Al and V.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 1; 76-79
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin-Orbit Interaction in a Spherical Quantum Dot
    Autorzy:
    Mikhail, I.
    Ismail, I.
    El Shafee, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198659.pdf
    Data publikacji:
    2014-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.-i
    71.70.Ej
    73.21.La
    75.70.Tj
    Opis:
    The conventional spin-orbit interaction due to the presence of an off-center impurity located in a spherical quantum dot of finite confining potential has been investigated. The different effective masses of dot and barrier are taken into consideration. The spin-orbit interaction has been calculated in the excited state (2p). The variational method has been applied by using a new form of the trial wave function in addition to the conventional form that has been used in previous work. The new form has the advantage of satisfying the boundary conditions at the interface between dot and barrier in the case of different masses. It has been shown that the spin-orbit interaction takes its highest value when the impurity is located in the vicinity of the position at which the radial electron probability takes its maximum value. The corresponding results of a central impurity has been investigated as the limiting case when the impurity radial coordinate tends to zero. The case of central impurity has been further explored by using the exact solution in the state (2p) of the radial Schrödinger equation in the presence of the impurity.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 5; 1197-1205
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Binding Energy of an Off-Center Hydrogenic Donor Impurity in a Finite Confining Potential Quantum Well
    Autorzy:
    Mikhail, I. F. I.
    Ismail, I. M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047296.pdf
    Data publikacji:
    2007-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.-m
    71.55.-i
    Opis:
    The binding energy of an off-center hydrogenic donor impurity in a finite confining potential quantum well was calculated by using a variational method of the Bastard type. New analytical expressions for the binding energy and for the initial deviation from the result of an infinite confining potential well were derived for the ground energy state. The sign of the initial deviation was found to depend on the location of the impurity. The analytical expressions were utilized further to derive some other important parameters.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 3; 373-385
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neural-sliding mode augmented robust controller for autolanding of fixed wing aircraft
    Autorzy:
    Ismail, I.
    Pashilkar, A. A.
    Ayyagari, R.
    Sundararajan, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/91533.pdf
    Data publikacji:
    2012
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    controller
    nonlinear dynamic inversion
    control signal
    phase compensator
    antiwindup scheme
    wing aircraft
    autolanding
    Opis:
    Neural and sliding mode controllers are generally based on the principle of nonlinear dynamic inversion. This leads to control signals containing high frequency components. This can result in actuator rate limiting due to loss of phase at higher frequencies. Large control inputs, for example due to the saturation component of the sliding mode controller can also result in position saturation of the actuator. In this paper we show that by the introduction of suitable phase compensators and an antiwindup scheme the neuralaided sliding mode controller performance can be improved. A novel scheme is proposed for the cascaded feedback controller which addresses practical requirements of both state limiting and control surface saturation respectively.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 4; 317-330
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Behavior of Jordanian Oil Shale during Combustion Process from the El-Lajjun Deposit
    Autorzy:
    Gougazeh, Mousa
    Alsaqoor, Sameh
    Borowski, Gabriel
    Alsafasfeh, Ashraf
    Hdaib, Ismail I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173323.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    El-Lajjun oil shale
    combustion
    X-ray diffraction
    thermogravimetric
    fourier transform infrared spectroscopy
    X-ray fluorescence
    Opis:
    The results of X-ray diffraction, thermogravimetric and FTIR spectroscopy analyses of mineral composition indicated that the El-Lajjun oil shale is principally composed of calcite, quartz with minor amounts of kaolinite), gypsum, and apatite. The obtained oil shale ash products at 830 °C and 1030 °C are dominated by lime, quartz, anhydrite, portlandite, gehlenite, and amorphous phases. The TGA weight loss curves clearly indicate that it occurred in the temperature range from 310 to 650 °C. The decomposition of oil shale carbonates was detected above 750°C. The functional groups in the organic material of oil shale are dominated by the aliphatic hydrocarbons, the semi-ash of which had diverse structures of polycyclic aromatic hydrocarbons. The most intensive of combustion occurred in the temperature range of 400–750 °C. In this temperature range, about 75 wt.% was accounted for the total mass loss.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 8; 133--140
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Challenges for managing non-technological innovation : a case from Malaysian public sector
    Wyzwania dotyczące zarządzania pozatechnologicznymi innowacjami : przypadek malezyjskiego sektora publicznego
    Autorzy:
    Ab Rahman, Z. N.
    Ismail, N.
    Rajiani, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/405375.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    innovative culture
    resources
    collaboration
    non-technological innovation
    kultura innowacyjna
    odpowiednie zasoby
    współpraca
    pozatechnologiczne innowacje
    Opis:
    The Malaysian government has encouraged public sectors to adopt innovation to create value added that will increase their wealth creation and to enhance their competitive advantage. There are many initiatives have been put forward to encourage the innovative activities, nonetheless, the efforts are rather less fruitful. Thus, this paper aims to discuss the challenges faced in managing non-technological innovation in the organization and suggest ways for improvement particularly in Malaysian public sectors. For that purpose, seven interviewees have been chosen to be interviewed using semi-structured questions from two categories; facilitator and implementer. Thematic approach is implemented to analyse the data collected. This study has identified three critical challenges, which include innovative culture, inadequate resources and lack of collaboration with other institutions.
    Rząd Malezji zachęcał sektory publiczne do przyjmowania innowacji w celu tworzenia wartości dodanej, która zwiększy ich dobrobyt i wzmocni przewagę konkurencyjną. Podjęto wiele inicjatyw zachęcających do innowacyjnych działań, jednak uzyskane wyniki nie są najlepsze. Niniejszy artykuł ma na celu omówienie wyzwań stojących przed zarządzaniem pozatechnologicznymi innowacjami w organizacji oraz zaproponowanie sposobów na poprawę aktualnego stanu, szczególnie w malezyjskich sektorach publicznych. W tym celu wybrano siedem osób, z którymi przeprowadzono wywiady, z wykorzystaniem półstrukturalnych pytań z dwóch kategorii; moderator i realizator. W celu analizy zebranych danych wdrożono podejście tematyczne. W badaniu wskazano trzy kluczowe wyzwania, które obejmują innowacyjną kulturę, nieodpowiednie zasoby oraz brak współpracy z innymi instytucjami.
    Źródło:
    Polish Journal of Management Studies; 2018, 17, 1; 7-16
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Responses of grofth of ladys fingers (Abelmoschus esculentus L.) to different treatments methods of dairy wastewater
    Autorzy:
    Al-Dulaimi, R.I.
    Ismail, N.
    Ibrahim, M.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/51987.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reclamation from palm oil mill effluent using an integrated zero discharge membrane-based process
    Autorzy:
    Ahmad, A. L.
    Idris, I.
    Chan, C. Y.
    Ismail, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/778766.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    palm oil mill effluent (POME)
    membrane
    wastewater
    water recycling
    carotenes
    Opis:
    This research emphasizes eloquently on membrane technology for treatment of palm oil mill effluent (POME) as it is the Malaysia’s largest and most important agro based industry. Findings established significant quality improvement with an efficient recovery of water from palm oil mill via innovative membrane application. Conventional bio-methods, whilst adhering to the Department of Environment’s (DOE) discharge regulations, produces brownish liquid which pales in comparison to the crystal clear water obtained through membrane treatment. The pre-treatment process consists of coagulation-flocculation using green environmental coagulant bases such as Moringa oleifera (MO) seeds. The ultrafiltration polyvinylidene difluoride (PVDF) and thin film composite (TFC) reverse osmosis were vital for the membrane processes. The system gave 99% suspended solids reduction in suspended solid and 78% of water present was successfully recovered. This technology guarantees water recovery with drinking water quality; meeting the US Environmental Protection Agency (USEPA) standard or could be recycled into the plant with sludge utilization for palm oil estates, thus enabling the concept of zero discharge to be executed in the industries. In addition, green and healthy antioxidants such as oil and beta-carotene can be recovered from POME further demonstrate. Silica gel showed better performance in separation of carotenes from oil at temperature 40°C using adsorption chromatography with 1154.55 ppm. The attractiveness of this technology, enabling the utilization of reuse of agricultural waste into potentially value added products.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 4; 49-55
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fusaria and other fungi taxa associated with rhizosphere and rhizoplane of lentil and sesame at different growth stages
    Autorzy:
    Abdel-Hafez, S.I.I.
    Ismail, M.A.
    Hussein, N.A.
    Abdel-Hameed, N.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/67219.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Fusarium
    fungi
    rhizosphere
    rhizoplane
    lentil
    sesame
    growth stage
    Lens culinaris
    Sesamum indicum
    Opis:
    Density and diversity of Fusarium species and other fungi associated with rhizosphere and rhizoplane of lentil and sesame plants at three different growth stages were investigated. Sixteen species of Fusarium were isolated from rhizosphere (13 species) and rhizoplane (11) of both plants studied. In lentil, 11 species were recorded from its rhizosphere (9 species) and rhizoplane (8). Fusarium species associated with lentil rhizoplane gave highest number of propagules at the first stage of plant growth while the ones of Fusarium associated with the rhizosphere produced the highest number at the second stage of growth. F. solani was the most common in the three growth stages. In addition, of two growth stages, F. culmorum and F. tricinctum were isolated from the rhizosphere while F. nygamai and F. verticillioides from the rhizoplane. The other species were recorded from only one growth stage of lentil plant. In sesame plants, rhizosphere yielded nine Fusarium species while rhizoplane gave only six from the three stages investigated. Stage I of sesame rhizosphere possessed the highest colony forming units of Fusarium. As the case for lentil, F. solani was the most common species in sesame rhizospere and rhizoplane. F. verticillioides and F. nygamai (in three different growth stages) followed by F. oxysporum and F. tricinctum (in two growth stages) were recorded using the dilution-plate and/or soil-plate methods from sesame rhizosphere soils. Rhizoplane Fusarium species of sesame plants were isolated at the three different growth stages with almost equal number of colony forming units. F. poae came after F. solani in its frequency since it was recovered from two growth stages. Several of the isolated species are well-known as pathogens to many cultivated plants. To the best of our knowledge, three species are recorded here for the first time in Egypt from the rhizosphere (F. acutatum), rhizoplane of sesame plants (F. longipes) and from rhizosphere of both lentil and sesame and rhizoplane of lentil (F. nygamai).
    Źródło:
    Acta Mycologica; 2012, 47, 1
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular identification of blast resistance genes in rice genotypes using gene-specific markers
    Autorzy:
    Al-Daej, M.I.
    Ismail, M.
    Rezk, A.A.
    El-Malky, M.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/80189.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    molecular identification
    resistance gene
    rice genotype
    Oryza sativa
    DNA marker
    single-nucleotide polymorphism
    simple sequence repeat
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reducing Volatile Organic Compound Emissions Using Biotrickling Filters and Bioscrubber Systems
    Autorzy:
    Shihab, Mohammed Salim
    Mhemid, Rasha Khalid Sabri
    Saeed, Liqaa I.
    Ismail, Hanan Haqi
    Alp, Kadir
    Powiązania:
    https://bibliotekanauki.pl/articles/2202121.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    volatile organic sulfur compounds
    ethanethiol
    biotrickling filter
    bioscrubber
    electron acceptor
    anoxic conditions
    Opis:
    A comparative study was conducted for differentiating between attached and suspended growth, represented by a lab-scale biotrickling filter and bio-scrubber under anoxic conditions, respectively. However, malodorous ethanethiol gas (ET) that was categorized as one of the volatile organic sulfur compounds (VOSCs) was studied using a variety of settings and parameters. In contrast, NO3− can be used as an electron acceptor in the bioconversion of ET gas to elemental sulfur and/or sulfate when no oxygen is available. Empty bed residence times (EBRTs), gas to liquid ratios (G/Ls) (40, 60, 80, 100, 150), and inlet concentrations (150, 300, 800, and 1500 mg/m3) were all investigated in relation to ET removal efficiency (RE) (30, 60, 90, and 120 s). While the G/L ratio of 80 resulted in efficient ET removal (more than 90.8% for 150 mg/m3 of inlet concentration), it could only achieve the extraction of 80.6% for 1500 mg/m3 of inlet concentration at a fixed EBRT of 60 s. These results were based on the performance of a lab-scale anoxic biotrickling filter. Even though mass transfer constraints and poor solubility of ET were factors, the performance of the biotrickling filter under anoxic settings was superior to that of the bioscrubber and improved the low oxidation rates of ET.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 10; 255--268
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ground Penetrating Radar’s (GPR) Imaging and Applications to Pavement Structural Assessment: a Case of Malaysia
    Autorzy:
    Muslim, N. H.
    Mohamed, M. I.
    Amin, Z. M.
    Shafaghat, A.
    Ismail, M.
    Keyyanfar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/224097.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pavement
    assessment pavements
    geophysical tools
    ground penetrating radar
    GPR
    REFLEX 2D software
    nawierzchnia
    ocena nawierzchni
    narzędzia geofizyczne
    georadar
    oprogramowanie REFLEX 2D
    REFLEX 2D
    Opis:
    Traditionally, pavement distress evaluations were carried out by visual observation. Traditional practice requires a person to walk along the stretch of the pavement to conduct distress survey, take photo and measure defects occurred at deteriorated surfaces. However, this approach is too subjective, generates inconsistencies of information, less reliable and time-consuming. Due to these shortcomings, the transportation practitioners in pavement maintenance seek for other alternative tools and techniques to arrest incapability of traditional practices. One of the tools available in the market is Ground Penetrating Radar (GPR). GPR is a geophysical tool known by ability to accommodate extensive data in pavement assessment, geotechnical investigation and structural assessment. The application of GPR is such new to most of road maintenance industry in Malaysia. Therefore, this study has been undertaken to evaluate the benefits of using GPR imaging and its application in assessing pavement structures in Malaysia. The GPR survey was conducted in Meranti street located at UTM (Universiti Teknologi Malaysia) campus, and then analyzed using REFLEX 2D simulation software. The finding shows there are three (3) types of information obtained from GPR survey included; identification of raw image and processed image, identification of pavement segments thickness, and identification of GPR response towards surface and subsurface conditions, which illustrated in radargram images. Furthermore, the GPR can perform at high speed and can save time. It is also beneficial for long-term investment due to ability to provide extensive information at a greater depth. The research indicates that interpretation of GPR’s radargram images consumes time due to the low resolution. Therefore, selection of GPR system is subject to level of accuracy and clarity of radar images needed in a project.
    Źródło:
    Archives of Transport; 2017, 42, 2; 39-51
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Groundwater quality and hydrogeological characteristics of Malacca state in Malaysia
    Jakość wód gruntowych i charakterystyka hydrogeologiczna stanu Malakka w Malezji
    Autorzy:
    Shirazi, S. M.
    Adham, M. I.
    Zardari, N. H.
    Ismail, Z.
    Imran, H. M.
    Mangrio, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/947218.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    aquifer productivity
    groundwater
    Malacca catchment
    pumping test
    water quality
    jakość wody
    pompowanie badawcze
    woda gruntowa
    wydajność warstwy wodonośnej
    zlewnia Malakka
    Opis:
    Groundwater quality and aquifer productivity of Malacca catchment in Peninsular Malaysia are presented in this article. Pumping test data were collected from 210 shallow and 17 deep boreholes to get well inventory information. Data analysis confirmed that the aquifers consisting of schist, sand, limestone and volcanic rocks were the most productive aquifers for groundwater in Malacca state. GIS-based aquifer productivity map was generated based on bedrock and discharge capacity of the aquifers. Aquifer productivity map is classified into three classes, namely high, moderate and low based on discharge capacity. Groundwater potential of the study area is 35, 57 and 8% of low, moderate and high class respectively. Fifty two shallow and 14 deep aquifer groundwater samples were analyzed for water quality. In some cases, groundwater quality analysis indicated that the turbidity, total dissolved solids, iron, chloride and cadmium concentrations exceeded the limit of drinking water quality standards.
    W artykule przedstawiono jakość wód gruntowych i wydajność warstwy wodonośnej w zlewni Malakka na Półwyspie Malajskim. Do badań zastosowano metodę pompowania badawczego z 210 płytkich i 17 głębokich odwiertów. Najbardziej wydajne okazały się poziomy wodonośne usytuowane w łupkach, piaskowcach, wapieniach i skale wulkanicznej. Na podstawie danych o podłożu i wydajności sporządzono mapę wydajności warstw wodonośnych. Wyróżniono trzy klasy wydajności warstw wodonośnych: wysoka (8%) badanego obszaru, umiarkowana (57%) i niska (35%). Analizom poddano 52 próbki z płytkich warstw i 14 próbek z głębokich warstw. W niektórych przypadkach stężenie zawiesiny, suchej masy, żelaza, chlorków i kadmu przekraczało dopuszczalne wartości dla wody pitnej.
    Źródło:
    Journal of Water and Land Development; 2015, 24; 11-19
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Poly(L-lactic acid)/deproteinized natural rubber blends with enhanced compatibility
    Mieszaniny poli(kwas L-mlekowy)/zdeprotonowany kauczuk naturalny o zwiększonej kompatybilności
    Autorzy:
    Mahendra, I Putu
    Nghia, Phan Trung
    Phuong, Nguyen Thi Hong
    Hang, Tring Thi
    Alias, Nur Fazreen
    Ismail, Hanafi
    Powiązania:
    https://bibliotekanauki.pl/articles/1789434.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    compatibility
    PLLA
    DPNR
    low molecular weight
    natural rubber
    grafting
    kompatybilność
    kauczuk naturalny o małym ciężarze cząsteczkowym
    szczepienie
    Opis:
    PLLA-g-LMWNR (LMWNR – low molecular weight natural rubber) was used as a compatibilizer (1–3 wt %) of poly(L-lactic acid)/deproteinized natural rubber (PLLA/DPNR) blend (95/5 w/w). The LMWNR was prepared using TiO2/ZnO (9 : 1 w/w) and H2O2 as co-catalyst. The obtained LMWNR was grafted with 0–12 wt % maleic anhydride (LMWNR-g-MA) and then with PLLA (PLLA-g-LMWNR). A significant improvement in the mechanical properties of the PLLA/DPNR blend was found in the blend that contained 3 wt % PLLA-g-LMWNR. Scanning electron microscopy showed a decrease in the pore diameter from 5.44 to 1.56 μm. The thermal analysis of PLLA/DPNR blends showed that the Tg value of PLLA phase shifted from 63.1 to 61.4°C. These results confirmed that PLLA-g-LMWNR can enhance the compatibility of the PLLA/DPNR blend.
    PLLA-g-LMWNR (LMWNR – kauczuk naturalny o małym ciężarze cząsteczkowym) stosowano jako kompatybilizator (1–3% mas.) mieszaniny PLLA/DPNR [poli(L-kwas mlekowy)/zdeprotonowany kauczuk naturalny] (95/5 w/w). LMWNR otrzymano z DPNR przy użyciu TiO2/ZnO (9 : 1 w/w) i H2O2 jako kokatalizatora, a następnie szczepiono bezwodnikiem maleinowym w ilości 0–12% mas. (LMWNR-g-MA). PLLA-g-LMWNR uzyskano w wyniku szczepienia PLLA z LMWNR-g-MA. Stwierdzono poprawę właściwości mechanicznych mieszaniny PLLA/DPNR zawierającej 3% mas. PLLA-g-LMWNR. Metodą SEM wykazano zmniejszenie średnicy porów z 5,44 do 1,56 μm. Wartość temperatury zeszklenia Tg fazy PLLA mieszaniny PLLA/DPNR, wyznaczona metodą analizy termicznej, zmniejszyła się z 63,1 do 61,4°C. Uzyskane wyniki potwierdziły, że dodatek PLLA-g-LMWNR zwiększa kompatybilność mieszaniny PLLA/DPNR.
    Źródło:
    Polimery; 2021, 66, 2; 105--111
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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