Preparation of star polymers based on polystyrene or polystyrene-b-N-isopropyl acrylamide) and divinylbenzene via reversible addition-fragmentation chain transfer polymerization

被引：112

作者：

Zheng, GH ^{[1
]}

Pan, CY ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Anhui, Peoples R China

来源：

POLYMER | 2005年 / 46卷 / 08期

关键词：

star-shaped polymers; RAFT polymerization; cross-linked polymerization;

D O I：

10.1016/j.polymer.2005.01.071

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Star polymers based on styrene/divinyl benzene (St/DVB) and PSt-b-poly(N-isopropyl acrylamide) (NIPAAM)/DVB have been successively prepared by 'arm-first' method via reversible addition-fragmentation chain transfer (RAFT) polymerization. The linear macro RAFT agent PSt-SC(S)Ph was prepared by RAFT polymerization of St using benzyl dithiobenzoate and AIBN as RAFT agent and initiator. Successive RAFT polymerization of NIPAAM with PSt-SC(S)Ph as macro RAFT agent to afford diblock copolymer, PSt-b-PNIPAAM-SC(S)Ph. The coupling reactions of PSt-SC(S)Ph or PSt-b-PNIPAAM-SC(S)Ph in the presence of DVB produced the star copolymers, C(PSt)(n) or C(PSt-b-PNIPAAM)(n). The molar ratio of DVB/PSt-SC(S)Ph and polymerization time influenced the yields, molecular weight and distribution of the star-shaped polymers, which was characterized by H-1 NMR and IR spectra, GPC measurements as well as DLS. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：2802 / 2810

页数：9

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