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Assessment of mechanical performance, thermal stability and water resistance of novel conductive poly(lactic acid)/modified natural rubber blends with low loading of polyaniline

ABSTRACTBiodegradable conductive polymer blends made from poly(lactic acid) (PLA), liquid natural rubber (LNR) and polyaniline (PANI) were prepared via a melt?blending technique assisted by ultrasonic treatment. The effects of PANI at low loading (0.03 to 0.11?wt%) on the electrical conductivity and mechanical, thermal and physical properties of PLA/LNR/PANI blends were investigated. It was found that the mechanical properties of samples improved when PANI was introduced into PLA/LNR. Tensile results showed that the optimum loading of PANI was achieved at 0.07?wt% with an improvement of 8% in tensile strength compared to neat PLA/LNR. Although it was at low loading, the incorporation of PANI promoted an outstanding electrical conductivity to PLA/LNR blends. Thermal analysis of the PLA/LNR/PANI blends was conducted using differential scanning calorimetry and thermogravimetry. The thermal stabilities of the blends were improved markedly with the presence of PANI. Comparing to PLA/LNR, the incorporation of PANI component improved the resistance towards water absorption. Variable?pressure scanning electron microscopy micrographs of PLA/LNR/PANI confirmed the good mixing of PANI with PLA/LNR and strong interaction networks among the PANI, PLA and LNR components. © 2018 Society of Chemical Industry

» Author: Dalila Shahdan , Ruey S Chen , Sahrim Ahmad , Farrah D Zailan , Adilah Mat Ali

» Reference: doi:10.1002/pi.5613

» Publication Date: 25/05/2018

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [605658].

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