Block and star block copolymers by mechanism transformation - X. Synthesis of poly(ethylene oxide) methyl ether/polystyrene/poly(L-lactide) ABC miktoarm star copolymers of by combination of RAFT and ROP

被引：60

作者：

Shi, PH ^{[1
]}

Li, YG ^{[1
]}

Pan, CY ^{[1
]}

机构：

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

来源：

EUROPEAN POLYMER JOURNAL | 2004年 / 40卷 / 07期

关键词：

reversible addition-fragmentation polymerization; ring-opening polymerization; miktoarm star copolymer; L-lactide;

D O I：

10.1016/j.eurpolymj.2004.02.024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(ethylene oxide) methyl ether/polystyrene/poly(L-lactide) (NIPEO/PSt/PLLA) ABC miktoarm star copolymers were synthesized by combination of reversible addition-fragmentation transfer (RAFT) polymerization and ring-opening polymerization (ROP) using bifunctional macro-transfer agent, MPEO with two terminal dithiobenzoate and hydroxyl groups. It was prepared by reaction of MPEO with maleic anhydride (MAh), subsequently reacted with dithiobenzoic acid and ethylene oxide. RAFT polymerization of St at 110 degreesC yielded block copolymer, MPEO-b-PSt KMPEO)(PSt)-CH2OH], and then it was used to initiate the polymerization Of L-lactide in the presence of Sn(OCt)(2) at 115 degreesC to produce ABC miktoarm star polymers, s+[(MPEO)(PSt)(PLLA)]. The structures of products obtained at each synthetic step were confirmed by NMR and gel permeation chromatography data. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1283 / 1290

页数：8

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