Dynamic vulcanization of epoxidized natural rubber (ENR) and fluoroplastic

Abstract

This study is purposed to develop a thermoplastic vulcanizate (TPV) via dynamic vulcanization made of ENR and poly (vinylidene fluoride) (PVDF). Rubber parts were mixed at room temperature by using two roll mill, fed in twin screw extruder with thermoplastic parts to occur dynamic vulcanization and then compressed in compression molding. This research was emphasized on the contents of ENR (50, 60 and 70 wt.%), PVDF, DBPH as curing agent (3, 5 and 7 phr) and organoclay (3, 5, 7 and 10 phr) including the addition of PLA at fixed 10 wt.% that affect on the properties of the dynamic blends in comparison to the ternary ones (the blends among ENR, PVDF and PLA). The ENR/PVDF was compared to acrylonitrile butadiene rubber (NBR)/PVDF at fixed composition (rubber/plastic/DBPH: 50/50/5) for studying the difference between synthetic and natural rubber. The results showed that dynamic vulcanization and increase of thermoplastic and DBPH contents have enhanced the mechanical properties (tensile and tear strength and hardness) and oil swelling resistance. Barrier properties increased with respect to organoclay contents. After aging at 100 °C for 22 h in air oven, mechanical properties and oil swelling resistance increased.