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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Influence of Matrix Polarity on the Properties of Ethylene Vinyl Acetate–Carbon Nanofiller Nanocomposites | Nanoscale Res Lett 2009 4 655-664 DOI 10.1007 S11671-009-9296-8 NANO EXPRESS Influence of Matrix Polarity on the Properties of Ethylene Vinyl Acetate-Carbon Nanofiller Nanocomposites Jinu Jacob George Anil K. Bhowmick Received 8 December 2008 Accepted 5 March 2009 Published online 21 March 2009 to the authors 2009 Abstract A series of ethylene vinyl acetate EVA nanocomposites using four kinds of EVA with 40 50 60 and 70 wt vinyl acetate VA contents and three different carbon-based nanofillers expanded graphite EG multiwalled carbon nanotube MWCNT and carbon nanofiber CNF have been prepared via solution blending. The influence of the matrix polarity and the nature of nanofillers on the morphology and properties of EVA nanocomposites have been investigated. It is observed that the sample with lowest vinyl acetate content exhibits highest mechanical properties. However the enhancement in mechanical properties with the incorporation of various nanofillers is the highest for EVA with high VA content. This trend has been followed in both dynamic mechanical properties and thermal conductivity of the nanocomposites. EVA copolymer undergoes a transition from partial to complete amorphousness between 40 and 50 wt VA content and this changes the dispersion of the nanofillers. The high VA-containing polymers show more affinity toward fillers due to the large free volume available and allow easy dispersion of nanofillers in the amorphous rubbery phase as confirmed from the morphological studies. The thermal stability of the nanocomposites is also influenced by the type of nanofiller. Keywords Nanocomposites Carbon fillers Ethylene vinyl acetate Elastomers Mechanical properties J. J. George A. K. Bhowmick El Rubber Technology Centre Indian Institute of Technology Kharagpur 721302 India e-mail anilkb@rtc.iitkgp.ernet.in Introduction Ethylene vinyl acetate EVA is one of the important organic polymers extensively used for electrical insulation cable jacketing and repair component .
