测量了PCL/PMVS共混物的凝胶含量、力学性能和形状记忆行为,研究了聚己内酯(PCL)与甲基乙烯基硅橡胶(PMVS)共混物的辐射交联行为.研究表明,PCL/PMVS共混物的辐射交联符合Charlesby-Pinner关系式,且PMVS对PCL的辐射交联有促进作用.随着共混物中硅橡胶用量的增加,凝胶化剂量降低,裂解与交联几率的比值p0/q0比值变小,辐射交联效率提高.共混物的拉伸强度和断裂伸长率随着辐射剂量的增加而下降,但下降的幅度比纯PCL-H5要小.在低温辐射交联PCL/PMVS共混物的弹性模量随着硅橡胶含量的增加而下降,在高温随着硅橡胶含量的增加而升高.适度交联的PCL/PMVS共混物具有较高的形状记忆特性,形变恢复率大于95%.
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