阳离子聚合
聚合
高分子化学
化学
离子聚合
二氯甲烷
链生长聚合
苯乙烯
溶液聚合
聚合物
共聚物
自由基聚合
有机化学
溶剂
作者
Ryohei Saitoh,Arihiro Kanazawa,Shokyoku Kanaoka,Sadahito Aoshima
出处
期刊:Polymer Journal
[Springer Nature]
日期:2016-05-18
卷期号:48 (9): 933-940
被引量:10
摘要
Cationic polymerization of p-methylstyrene (pMeSt) was examined using various metal chlorides as Lewis acid catalysts in dichloromethane. All of the catalysts used produced poly(pMeSt)s in the presence of 2,6-di-tert-butylpyridine (DTBP). However, the polymerization behavior differed depending on the type of metal chloride. The polymerization reactions conducted using SnCl4 and ZnCl2 proceeded in a controlled manner and yielded well-defined polymers, whereas metal trichlorides (for example, AlCl3, FeCl3 and GaCl3) induced uncontrolled polymerization. In addition, the combination of SnCl4 and DTBP allowed the controlled polymerization of styrene (St) and p-chlorostyrene (pClSt). Moreover, this initiating system was efficient for the synthesis of star-shaped poly(pMeSt)s via the arm-first method through the addition of an alkylstyrene-type divinyl compound used as a cross-linking agent. Cationic polymerization of p-methylstyrene (pMeSt) was examined using various metal chlorides as Lewis acid catalysts in dichloromethane. Polymerization using SnCl4 and ZnCl2 in conjunction with 2,6-di-tert-butylpyridine (DTBP) proceeded in a controlled manner in contrast to the reactions with metal trichlorides, including AlCl3, FeCl3 and GaCl3. In addition, the combination of SnCl4 and DTBP allowed the controlled polymerization of less reactive styrenes and the synthesis of star-shaped poly(pMeSt)s through the cross-linking reaction using an alkylstyrene-type divinyl compound.
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