朱永淑,李锦春,吴珏,卞荣祥,俞强

• 1:江苏工业学院材料科学与工程系常州市高分子材料重点实验室
• 2:江苏工业学院材料科学与工程系常州市高分子材料重点实验室
• 3:江苏工业学院材料科学与工程系常州市高分子材料重点实验室
• 4:江苏工业学院材料科学与工程系常州市高分子材料重点实验室

摘要(Abstract)：

采用差示扫描量热(DSC)和动态力学分析(DMA)方法研究二甲基丙烯酸聚乙二醇酯(PEGDMA)的可逆加成-断裂链转移(RAFT)自由基交联聚合,探索了交联单体双键间链段长度和链柔性对RAFT交联聚合动力学及其交联结构的影响。实验发现,随着双键间乙二醇单元数由4增加到9,聚合速率加快,当乙二醇单元数由9增加到14,聚合速率不增反降,这种行为是交联网络密度减小后增长自由基浓度下降和悬挂双键反应活性增加共同作用的结果;双键间链段柔性的增加使RAFT交联聚合速率加快;随双键间链段长度增加,交联网络密度和玻璃化转变温度降低,交联网络的均匀性得到改善。

关键词(KeyWords)： 可逆加成-断裂链转移聚合;二甲基丙烯酸聚乙二醇酯;聚合动力学;交联结构

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(20674032)

作者(Author): 朱永淑,李锦春,吴珏,卞荣祥,俞强

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