【摘要】 测量了PCL／PMVS共混物的凝胶含量、力学性能和形状记忆行为,研究了聚已内酯(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％．更多还原

【Abstract】 The performance of radiation crosslinked blends of polycaprolactone(PCL) and poly-methylvinylsiloxane (PMVS) was investigated. The results showed that PMVS played a promoting role in radiation crosslinking reaction. As the usage of PMVS increased, the gelation dose and the ratio of degradation to cross-linking (p0/q0) decreased, these demonstrated that the efficiency of radiation crosslinking of PCL was boosted. The elastic modulus of radiation crosslinked PCL/PMVS blends decreased with the increase of PMVS under the melting point temperature of PCL, and increased with the increase of PMVS above the melting point temperature of PCL. The properly crosslinked PCL/PMVS blends has good shape memory effects and the ratios of deformation recovery (>95%).更多还原