链转移剂对氟橡胶相对分子质量的影响

Effect of chain transfer agent on molecular weight of fluororubber

利用在聚合反应阶段对链转移剂的加入时间、加入量、链转移种类和总反应时间的控制,获得不同门尼黏度和相对分子质量的FKM26氟橡胶,并对不同门尼黏度的橡胶进行了性能研究。结果表明,通过对链转移剂的控制可以有效调节聚合物相对分子质量和门尼黏度,高门尼黏度的橡胶在耐油性和压缩形变性能均优于低门尼黏度的橡胶。

FKM26 fluororubber with different Mooney viscosity and molecular weight was obtained by controlling the addition time,amount,type of chain transfer agent and total reaction time of chain transfer agent in the polymerization stage.The properties of FKM26 fluororubber with different Mooney viscosity were studied.The results show that the molecular weight and Mooney viscosity of polymer can be effectively adjusted by controlling the chain transfer agent.The oil resistance and compression deformation properties of high Mooney viscosity rubber are better than those of low Mooney viscosity rubber.