Effects of carbon black on the properties of CR/TPI blends

The effects of carbon black on the properties of chloroprene rubber/trans-1,4-polyisoprene(CR/TPI) compounds and vulcanizates were studied.The results showed that with the increase of carbon black granular size,the scorching time and optimum cure time of CR/TPI compounds increased.The tensile strength,elangation at break,compression heat build-up,flexing crack and carbon black dispersion of the CR/TPI vulcanization depressed,and the resilience,abrasion loss and heat aging properties improved.With the increase of the amount of carbon black N330,the tensile strength increased and decreased then.The elangation at break,abrasion loss and flexing crack depressed,and the properties of compression heat build-up,shore A hardness and reliscence increased at the same time.