Poly(styrene-b-butyl acrylate-b-styrene) copolymers prepared by iodine transfer bulk polymerization: Kinetics, structure and properties

被引：0
|
作者：
Zhang L. [1 ]
Chang Z. [1 ]
Yu D. [2 ]
Bao Y. [1 ,2 ]
机构：
[1] State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou
[2] Institute of Zhejiang University-Quzhou, Quzhou
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2024年 / 38卷 / 03期
关键词：
block copolymer; iodine transfer polymerization; kinetics; poly(butyl acrylate); polystyrene;
D O I：
10.3969/j.issn.1003-9015.2024.03.010
中图分类号：
学科分类号：
摘要：
Iodine-terminated poly(butyl acrylate) (I-PBA-I) was prepared by iodine transfer bulk polymerization using iodoform chain transfer agent and azo-initiator, and further applied as a macro-chain transfer agent in the chain extension polymerization of styrene to synthesize poly(styrene-b-butyl acrylate-b-styrene) (PS-b-PBA-b-PS) copolymers. The polymerization kinetics, structure and properties of PS-b-PBA-b-PS were characterized. The results show that both homopolymerization of butyl acrylate and block copolymerization of styrene exhibit the characteristics of "living radical polymerization". The number average molecular weight of I-PBA-I was increased from 15 000 to 134 500 as the feed molar ratio of BA to CHI3 (nBA,0/nCHI3,0) increased from 100/1 to 1 000/1. PS-b-PBA-b-PS copolymers with the number average molecular weight of 46 000, 69 000, 97 500 and 127 000 were obtained at nBA,0/nSt,0 ratios of 1/1, 1/2, 1/3 and 1/4, respectively. Micro-phase separation was observed in PS-b-PBA-b-PS copolymers, and block copolymers exhibited certain transparency and improved toughness. The impact strength of PS-b-PBA-b-PS copolymer with nPS/nPBA of 3.85/1 was similar to that of commercial styrene-butadiene block copolymer prepared by anion living polymerization. © 2024 Zhejiang University. All rights reserved.
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页码：432 / 439
页数：7
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