国产钕系顺丁橡胶的加工性能及硫化胶性能

Processibility of domestic neodymium-based cis-1,4-polybutadiene rubber and properties of vulcanizates

研究了中国石化北京燕山分公司生产的钕系顺丁橡胶(Nd-BR,牌号为Nd 40)的加工性能及硫化胶的性能,并与国产牌号为BR 9000的镍系顺丁橡胶(Ni-BR)和国外生产的牌号为CB 24的Nd-BR进行了对比。结果表明,与BR 9000和CB 24相比,Nd 40生胶的门尼黏度相近,冷流性较高,但Nd 40混炼胶的门尼黏度和格林强度高,挤出特性稍差;Nd 40硫化胶的综合力学性能明显优于BR9000硫化胶,尤其是弹性和动态压缩温升,具有更低的滚动阻力和更高的刚度;与CB 24硫化胶相比,Nd 40硫化胶的扯断伸长率较高,生热更低,耐磨性更好,其他性能稍逊。

The processibility of domestic neodymi- um-based cis-1, 4-polybutadiene rubber （ Nd-BR, brand of Nd 40） and properties of vulcanizates pro- duced by SINOPEC Yanshan Branch Company were studied and compared with domestic nickel-based cis-1,4-polybutadiene rubber（ Ni-BR, brand of BR 9000） and imported Nd-BR（brand of CB 24）. The results showed that compared with BR 9000 and CB 24, Nd 40 gum had the similar Mooney viscosity, but higher cold flow performance, Nd 40 compounds possessed higher Mooney viscosity and Green strength, but poor extrudity. The comprehensive me- chanical properties of Nd 40 vulcanizates were betterthan those of BR 9000 vulcanizates, especially in elasticity and dynamic lleat build-up. And the roll- ing resistance indicator and stiffness index of Nd 40 vulcanizates were higher than those of BR 9000 vul- canizates. Compared with CB 24 vulcanizates, Nd 40 vulvanizates had longer elongation, lower heat buildup, better abrasion resistance, other properties were a bit lower than those of CB 24.