Controlling the degree of branching in atom-transfer radical polymerization of hyperbranched polyacrylates

被引：0
作者：
Yoo, SH
Yoon, TH
Jho, JY
机构：
[1] Seoul Natl Univ, Hyperstructured Organ Mat Res Ctr, Seoul 151744, South Korea
[2] Seoul Natl Univ, Sch Chem Engn, Seoul 151744, South Korea
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2001年 / 22卷 / 16期
关键词：
D O I：
10.1002/1521-3927(20011101)22:16<1319::AID-MARC1319>3.0.CO;2-Z
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Atom-transfer radical polymerizations of 2-(2-bromopropionyloxy)ethyl acrylate (BPEA) and 4-(2-bromopropionyloxy)butyl acrylate (BPBA) provided hyperbranched polyacrylates (HPEA and HPBA, respectively) in this study. The rate of polymerization of BPEA was faster than that of BPBA and the degree of branching of HPEA was higher than that of HPBA under the same,reaction conditions. The degree of branching (DB) of the hyperbranched polyacrylates was enhanced in the presence of acetone or methanol as a cosolvent. In particular, the use of acetone resulted in a higher DB than that observed in methanol by generating the proper reactivity ratio of the two propagating sites.
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页码：1319 / 1324
页数：6
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