Effect of fillers and nitrile blended PVC on natural rubber/high styrene rubber with nanosilica blends: Morphology and wear

The blends of high styrene rubber (HSR) and natural rubber (NR) with nitrile blended PVC (NVC) and nanosilica are prepared by using a blending technique in presence of different types of carbon black. The effect of filler on morphological and wear characteristics is studied. ISAF type of carbon black have showed a significant effect on optimum cure time, cure rate index and mechanical properties by reacting at the interface between NVC, HSR and NR matrix. All the samples show only one melting peak on the DSC curve; this is attributed to the same backbone structure of the matrix and the carbon black reinforcement. The samples containing 20 wt.% of NVC with ISAF N234 type of carbon black has shown maximum heat buildup and lower compression set value. Blends containing ISAF type of carbon black with 20 wt.% of NVC shows high abrasion resistant properties against Du-Pont abrader, DIN abrader and different mining rock surfaces and also is found to be the toughest rubber against all types of rock. Coal is identified the main abrader against the rubber blends under this study.