Composites of Cysteamine Functionalised Graphene Oxide and Polypropylene

Abstract Cysteamine functionalised reduced graphene oxide (rGO) was grafted to polypropylene-graft-maleic anhydride (PP-g-MA) and subsequently melt blended with PP. The covalent bridging of rGO PP-g-MA via the cysteamine molecule co-crystallization are routes promoting interfacial interactions between PP matrix. A rheological percolation threshold achieved for a nanofiller loading 3 wt% 5 wt%, but none detected composites prepared un-functionalized rGO. At low loadings (0.1 wt%), functionalized is well dispersed in matrix, an interconnecting filler-filler, polymer-filler polymer-polymer network formed, resulting increased tensile toughness (1 500%) elongation at break (40%) relative neat Irrespective whether or not, it had significant effect on crystallization behavior PP, inducing heterogeneous nucleation, increasing crystallisation temperature (T m ) by up 10°C decreasing crystalline content (X c ∼30% highest (5 wt%) filler loading. growth monoclinic a-phase preferred addition b crystal suppressed.