文档介绍：聚苯乙烯-b-聚苯乙烯丁二烯-b-聚苯乙烯嵌段共聚物的RAFT细乳液聚合与表征
浙江大学博士学位论文 摘要
摘 要
在工业上，活性阴离子溶液聚合是合成不同结构和组成嵌段共聚物的方法， 但是阴离子且其相界面宽度最窄， 使得其拉伸至断裂过程中的应力．应变(a-￡)积分面积最大，力学性能最好。
综上，本文以PS．b．PS／Bu．b—PS嵌段共聚物为目标，基于动力学模型控制的 加料策略，合成与表征了不同结构和组成的S／Bu共聚物，研究了共聚物的热性 能与S／Bu嵌段的序列结构、力学性能与微相形态之间的关系。
关键词：苯乙烯／T--烯嵌段共聚物；可逆加成．断裂链转移自由基聚合；(细) 乳液聚合；动力学模型；性能与结构
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浙江大学博士学位论文 Abstract
Abstract
Anionic polymerization is the most used method industrially which call synthesize a variety of copolymers with different structm'es．However,anionic polymerization requiring removing water and oxygen is usually performed in solvent and lower temperature and the polymerization condition is very rigorous．Moreover,
anionic polymerization method is only fit for some very few monomers，for example，
styrene and butadiene．Reversible Addition—Fragmentation chain Transfer(RAFT) (mini)emulsion polymerization was ail environmental friendly,energy saving for most
monomers，considered to be one of the most prominent“living'’／controlled free radical polymerization from both industrial and commercial perspectives．
To prepare the toughened styrene／butadiene block copolymers，RAFT (mini)emulsion polymerization method Was acquired to get PS-b—PS／Bu-b-PS block copolymers witll different molecular structure and composition．butadiene seeded
miniemulsion polymerization mediated by PS—PEPDTA macromolecular RAFT agent
Was performed and RAFT binary monomers(mini)emulsion copolymerization kinetic model Was established．PS—b—PS／Bu-b-PS block copolymers were synthesized by feeding strategy of model contr01．Synthesis kinetics and relationship between its properties and microphase morphology Was explored．
The styrene and butadiene RAFT polymerization were researched firstly．Styrene RAFT bulk and miniemulsion polymerization kinetics were performed、析m PEPDTA． For styrene bulk RAFT polymerization，the retardation Was not obvious．For st