摘要
以咪唑类离子液体[omim]BF4为溶剂,在0℃下,采用不同的引发体系,实现并证实了IBVE在离子液体中进行阳离子聚合的可行性。对比传统溶剂(CH2Cl2)中IBVE的阳离子聚合特征,发现在离子液体中合成的聚合物的产率和分子量更高、分子量分布更窄,产物的SEC(RI)曲线呈单峰分布。从聚合物末端结构分析,离子液体中阳离子聚合的基元反应与传统溶剂中基本一致,未发现离子液体中咪唑阳离子参与链引发反应以及四氟硼酸阴离子参与链转移/链终止反应。离子液体和传统溶剂中合成的PIBVE的玻璃化转变温度(Tg)分别为-20.35℃和-18.08℃,两者非常接近。
Imidazole ionic liquid [omim]BF4 as solvent,adopting different initiating systems,at 0℃ ,PIBVE was synthesized by cationic polymerization in ionic liquid and the feasibility of synthesis was confirmed. Comparing to the cationic polymerization characteristics of IBVE in the conventional solvent （CH2Cl2 ）, the products prepared in ionic liquid had high- er yield and molecular weight,a narrower molecular weight distribution,and the SEC（RI） curve of products was unimodal distribution. The primitive reaction in polymerization process in ionic liquid was substantially consistent with that in the conventional solvent by analyzing the terminal structures of the polymers. It was not discovered that the imidazolium cation of ionic liquid initiated the polymerization reaction and the tetrafluoroborate anion participated in the chain transfer/termi- nation reactions. The glass transition temperature（Tg） of PIBVE obtained in ionic liquid and conventional solvent were - 20.35 ℃ and -18.08℃, respectively. They were almost similar.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第9期101-103,共3页
New Chemical Materials
基金
国家自然科学基金项目(51373026)
北京市教委科技计划项目(KM201210017007)
关键词
异丁基乙烯基醚
离子液体
相容性
阳离子聚合
isobutyl vinyl ether, ionic liquids, compatibility, cationic polymerization
