稀土异戊橡胶替代天然橡胶共混硫化胶的性能研究

Study on the Properties the of Isoprene Rubber Instead of Natural Rubber

研究了稀土异戊橡胶(Nd-IR)和天然橡胶(NR)的共混比对其硫化性能及力学机械性能的影响.研究结果表明:随着Nd-IR用量的增加,Nd-IR/NR共混胶的焦烧时间延长,硫化安全性提高;Nd-IR/NR共混硫化胶的拉伸强度、定伸应力和弹性以及老化后性能率略有下降,硬度(邵尔A)、断裂伸长率和磨耗性能有所提高;电子扫描显微镜(SEM)对共混胶形态分析表明,炭黑在Nd-IR/NR共混橡胶中均匀分散,没有出现团聚和微相分离现象.

The vulcanized properties, mechanical properties and a series of other measurements of Nd-IR/NR were investigated. The results indicated that with the increase of Nd-IR, t10 of the vulcanized rubber elongated implying the vulcanized security enhanced. Tensile strength, tensile stress, elasticity and aging property decreased slightly while the hardness, elongation at break and abrasion resistance enhanced. With the help of SEM analysis, carbon black particles dispersed evenly in the blends, no evident aggregation and phase separation was observed.