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۱The effect of nanotubes’ content and their hydroxy– and carboxy–functionalization in (hydrogenated) nitrile rubber
نویسنده(ها):
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
Nanocomposites were prepared by mixing (un)functionalized multi–walled carbon nanotubes (MWCNT) with hydrogenated nitrile elastomer (HNBR). Utilization of transmission electronic microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM), and small– and wide–angle X–ray scattering techniques (SAXS and WAXS), for advanced morphology observation of conducting fillers–reinforced hydrogenated nitrile rubber composites, is reported. Increase in hardness, elastic modulus, tensile strength, density, and tear strength with increasing nanotube content was clearly visible for unfunctionalized, hydroxy–, and carboxy–functionalized nanotubes due to enhanced distribution of carbon nanotubes (CNT) and their aggregated particles in the applied rubber matrix. Dynamic mechanical analysis (DMA) of the composites indicated outstanding properties, the composites having dissimilar behaviour depending predominantly both on nanotubes’ type and content and consequently on rubber\filler interface surface topography that is the extent of presence of carbon nanotube aggregates having different size and structure depending on the type and the content of nanotubes.<\div>

۲Morphology, mechanical, structural, and thermal properties of hydrogenated nitrile rubber\hydroxy–functionalized multi–walled carbon nanotubes\ionic liquid composites: The effect of ionic liquid type
نویسنده(ها):
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
In order to achieve good morphological, mechanical, structural, and thermal properties of a polymer electrolyte, ionic–liquid–in–polymer electrolytes have been explored. It was found that 1–ethyl–3–methylimidazolium, 1– butyl–3–methylimidazolium, and 1–butyl–1–methylpyrrolidinium tetrafluoroborate, hexafluorophosphate, and bis(trifluoromethylsulfonyl)imide (EMImBF4, BMImBF4, BMPyBF4, EMImPF6, BMImPF6, BMPyPF6, EMImTFSI,BMImTFSI, and BMPyTFSI) in hydroxy–functionalized multi–walled carbon nanotubes (MWCNT–OH) reinforced poly(acrylonitrile–co–1,3–butadiene) (HNBR) produce homogeneous solids. HNBR\MWCNT–OH\ionic liquid solid electrolytes were prepared by melt compounding of the nanotubes in the rubber, mixing with curing system, curing, and immersion in the ionic liquid. In the presence of 12.9 wt% of the curing system, these HNBR–based electrolytes displayed elastomeric properties and high tensile strength (up to 24 MPa). HNBR\MWCNT–OH\ionic liquid nanocomposites had the elongation at break up to 378% at the room temperature, for ionic liquid concentrations up to 18 wt%. Thermal analysis showed that Tg of HNBR\MWCNT–OH\ionic liquid systems is well decreased as a function of decreasing polymer content.<\div>
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