溴化丁基橡胶并用胶的性能研究

Study on Property of BIIR Blends

通过与溴化丁基橡胶(BIIR)的性能对比,研究BIIR/天然橡胶(NR)、BIIR/顺丁橡胶(BR)和BIIR/丁苯橡胶(SBR)并用胶的性能。结果表明:BIIR/NR并用胶加工性能最好,硫化特性优异,硫化胶的物理性能和气密性较好;BIIR/BR并用胶的交联密度最大,挤出胀大率对剪切速率的变化敏感性最小;BIIR/SBR并用胶加工性能较为优异,焦烧时间和硫化时间最长,热老化后强度性能保持率较大,且在低剪切速率下挤出胀大率最小。

Compared with BIIR,the properties of BIIR/NR,BIIR/BR,BIIR/SBR blends were studied. The results showed that,the processability of BIIR/NR blend was the best,meanwhile the cure characteristics,physical properties and gas-tightness of BIIR/NR blend were good. The crosslinking density of BIIR/BR blend was the highest,and the die swell ratio was the most insensitive with the change of shear rate. BIIR/SBR blend also had good processability,and its scorch time and curing time were the longest,it had excellent physical property retention after thermal aging,and its die swell ratio at low shear rate was the lowest.