改进型中乙烯基聚丁二烯橡胶性能的研究 Ⅰ生胶性能

Study on Properties of Modified MVBR Part 1 Properties of Polymer

系统研究线形中乙烯基聚丁二烯橡胶（ＬＭＶＢＲ）、星形中乙烯基聚丁二烯橡胶（ＳＭＶＢＲ）、线形１，４１，２立构二嵌段中乙烯基聚丁二烯橡胶（ＬＢＭＶＢＲ）和星形１，４１，２立构二嵌段中乙烯基聚丁二烯橡胶（ＳＢＭＶＢＲ）的生胶性能，发现ＳＭＶＢＲ具有高屈服强度、高门尼粘度的特点；星形支化结构、立构嵌段结构有利于改善生胶的抗冷流性能；具有相分离结构的ＬＢＭＶＢＲ抗冷流性能最佳。

The properties of raw linear MVBR(L MVBR),star type MVBR(S MVBR),linear 1,4 1,2 steoro diblock MVBR(L B MVBR) and star type 1,4 1,2 steoro diblock MVBR(S B MVBR) were systematically investigated.It was found that S MVBR featured high yield strength and high Mooney viscosity;the star branched structure and the steoro block structure were useful to improve cold flow resistance of unvulcanized rubber;the L B MVBR with separate phase structure possessed the best cold flow resistance.