共混物IR/CR/苯乙烯类嵌段共聚物的结构与性能研究

Structure and Properties of IR/CR/Styrene Block Copolymer Blends

选择苯乙烯－异戊二烯－苯乙烯嵌段共聚物（ＳＩＳ）、苯乙烯－丁二烯－苯乙烯嵌段共聚物（ＳＢＳ）和α－甲基苯乙烯－丁二烯－α－甲基苯乙烯嵌段共聚物（ＭＳＢＭＳ）３种苯乙烯类嵌段共聚物作为相容剂，通过理论预测和试验测试，研究了它们对ＩＲ／ＣＲ共混物网络结构和力学性能的影响。结果表明，加入ＳＩＳ，ＳＢＳ和ＭＳＢＭＳ可以明显提高硫化胶的弹性常数２Ｃ１和２Ｃ２以及拉伸强度，减小体系的损耗因子。３种共聚物的作用效果顺序为：ＳＩＳ＞ＳＢＳ≥ＭＳＢＭＳ。ＳＩＳ的最佳用量为３～７份。

The effect of a small amount (<10 wt%) of different styrene block copolymers on the structure and physical properties of IR/CR blend was investigated.The results showed that the elastic constants 2 C 1 and 2 C 2,and the tensile strength of the vulcanizate increased with the addition of SIS,SBS or MSBMS while tg δ decreased.The order of the compatibilization in IR/CR blend was as follows:SIS>SBS≥MSBMS.