Synthesis of poly(styrene)-b-poly(2-vinyl pyridine) four-arm star block copolymers via ATRP and their self-assembly behaviors
Synthesis of poly(styrene)-b-poly(2-vinyl pyridine) four-arm star block copolymers via ATRP and their self-assembly behaviors
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DOI：
10.1016/j.polymer.2020.123212
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发表时间：
2021-01-10
期刊：
影响因子：
4.6
通讯作者：
Huang, Chih-Feng
中科院分区：
文献类型：
--
作者：
Hsu, Chia-Juei;Tu, Cheng-Wei;Huang, Chih-Feng
在本研究中，研究了具有高相互作用参数（chi）特征的聚（苯乙烯）-b-聚（2-乙烯基吡啶）四臂星形嵌段共聚物（（PS-b-P2VP）（4）sBCP）的合成。为了获得明确的 sBCP，可以预见对含吡啶单体的 ATRP 的挑战。因此，我们仔细研究了具有不同卤素链末端（即 (PS-X)(4)，其中 X = Br/Cl）的 PS macminitiators (MI) 到后续链延伸的多米诺骨牌效应。从苄基卤（BzX，其中 X = Br/Cl）和 2-甲基吡啶（2 MP）的模型反应可以明显看出，BzCl 和 2 MP 的组合可以显着抑制取代副反应。因此，获得了明确的 (PS-b-P2VP)(4) sBCP（M-n = ca. 58 k-82 k，PDI
In this study, synthesis of poly (styrene)-b-poly (2-vinyl pyridine) four-arm star block copolymers ((PS-b-P2VP)(4) sBCPs) possessing high interaction parameter (chi) feature was investigated. To obtain well-defined sBCPs, a challenge on ATRP of pyridine-containing monomers is foreseeable. We thus scrutinized the domino effect from PS macminitiators (MIs) having different halogen chain ends (i.e., (PS-X)(4), where X = Br/Cl) to the subsequent chain extensions. As evident from the model reactions of benzyl halides (BzX, where X = Br/Cl) and 2-methylpyridine (2 MP), the combination of BzCl and 2 MP can significantly suppress the substitution side reaction. Consequently, well-defined (PS-b-P2VP)(4) sBCPs were obtained (M-n = ca. 58 k-82 k with PDI