Preparation of chemically functionalized and self compatibilized short coir fiber ‐ high density polyethylene composites

Abstract

AbstractThe interphase adhesion plays key role in the performance of composites. The commonly employed strategies include blending with an external compatibilizer or utilizing chemical grafting followed by purification and copolymerization. Here, we showcase a reformed and simple approach in the fabrication of chemically functionalized, self compatibilized composites [PE‐TCF5%‐MA2%] by insitu grafting of maleic anhydride in the polymer melt, followed by the reactive compatibilization of treated short coir fiber. Micro‐structural analysis of the composites revealed enhanced fiber/matrix adhesion. The improved mechanical, viscoelastic, and thermal properties of composites can be attributed to new interfacial bond formed, which was confirmed by Fourier transform infrared [FTIR] studies. PE‐TCF5%‐MA2% exhibited approximately 74% and 25% improvement in tensile strength compared to untreated (PE‐UCF) and treated (PE‐TCF) fiber composites respectively. Dynamic mechanical analysis of composites displayed similar trend with highest value of storage modulus recorded for PE‐TCF5%‐MA2%. Final decomposition temperature of all composites was shifted to higher side. Peak degradation temperature was increased with a marginal increase of residual char. Together with the goodness of agro‐based fiber and feasiblity of this low cost method suggests the potential of PE‐TCF‐MA toward bulk industrial prodution of composite panels.