Cationic Copolymerization of o-Phthalaldehyde and Vinyl Monomers with Various Substituents on the Vinyl Group or in the Pendant: Effects of the Structure and Reactivity of Vinyl Monomers on Copolymerization Behavior
Cationic Copolymerization of o-Phthalaldehyde and Vinyl Monomers with Various Substituents on the Vinyl Group or in the Pendant: Effects of the Structure and Reactivity of Vinyl Monomers on Copolymerization Behavior
复制标题
邻苯二甲醛与乙烯基上或侧链具有不同取代基的乙烯基单体的阳离子共聚：乙烯基单体的结构和反应活性对共聚行为的影响
DOI：
10.1021/acs.macromol.2c00470
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发表时间：
2022-04
期刊：
影响因子：
5.5
通讯作者：
Keisuke Hayashi;Arihiro Kanazawa;S. Aoshima
中科院分区：
文献类型：
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作者：
Keisuke Hayashi;Arihiro Kanazawa;S. Aoshima
研究了邻苯二醛与各种苯乙烯衍生物和乙烯基醚的阳离子共聚，重点研究了乙烯基单体的结构和反应性与共聚行为的关系。对于苯乙烯衍生物，乙烯基上的α-或β-取代基（或环结构）的存在对于有效的交叉反应是必不可少的。乙烯基上没有取代基的苯乙烯衍生物不与OPA发生共聚。相比之下，α-取代乙烯基醚以外的各种乙烯基醚与OPA发生共聚反应。为了实现类交替共聚，使用具有大位阻和高反应性β-碳的乙烯基单体是有效的。此外，还成功地从苯乙烯衍生物中获得了可降解成低分子量化合物的共聚物。
Cationic copolymerization ofo-phthalaldehyde with various styrene derivatives and vinyl ethers was investigated, particularly focusing on the relationship between the structure and reactivity of vinyl monomers and the copolymerization behavior. In the case of styrene derivatives, the existence ofα- orβ-substituents (or cyclic structures) on the vinyl group was indispensable for efficient crossover reactions. Styrene derivatives with no substituents on the vinyl group did not undergo copolymerization with OPA. In contrast, various vinyl ethers other thanα-substituted vinyl ethers underwent copolymerization with OPA. To realize alternating-like copolymerization, the use of vinyl monomers that have both large steric hindrance and highly reactiveβ-carbon was effective. In addition, copolymers that are degradable into low-molecular-weight compounds were successfully obtained from styrene derivatives.