Cellulose nanofibres as biomaterial for nano-reinforcement of poly[styrene-(ethylene-co-butylene)-styrene] triblock copolymer
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Cellulose nanofibres (CNFs) obtained from waste mango wood scrap were used for the preparation of nanocomposites with SEBS (poly[styrene-(ethylene-co-butylene)-styrene]) and SEBS-g-MA (SEBS-maleic anhydride grafted). Results revealed the incompatibility of CNFs with unmodified SEBS due to the lack of interaction between polar and nonpolar groups. The polar maleic anhydride groups in SEBS-g-MA (mSEBS) demonstrated a strong interfacial interaction with CNFs showing a compatible association. Nanocomposite films with very minute loading of CNFs [0.005 phr (parts per hundred resin)] resulted in a substantial increment in Young’s modulus (98% increment) and tensile strength (70% improvement) as compared to neat mSEBS film along with increment in elongation at break. The nanocomposite films showed the integration of CNFs as an interwoven thread-like structure in the polymer matrix at 0.001 phr. Polymer coated continuous foam/porous network microstructure was observed at 0.005 phr loading.
KeywordsCellulose nanofibres Nanocomposites Thermoplastic elastomer Mechanical properties
This research project has been supported by the Science and Engineering Research Board, Govt of India, under the Early Career Research Award (Grant No. ECR/2016/000621/CS).
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