Preparation of polystyrene poly(ethylene glycol) diblock copolymer by 'living' free radical polymerisation

被引：45

作者：

Chen, XY

Gao, B

Kops, J ^{[1
]}

Batsberg, W

机构：

[1] Tech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, Denmark

[2] Riso Natl Lab, Dept Solid State Phys, DK-4000 Roskilde, Denmark

来源：

POLYMER | 1998年 / 39卷 / 04期

关键词：

amphiphilic block copolymers; 'living' free radical polymerisation; poly (ethylene glycol);

D O I：

10.1016/S0032-3861(97)00341-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Amphiphilic diblock copolymer containing segments of polystyrene and monomethoxypoly(ethylene glycol) (PS-b-PEG) was synthesised by a novel method. Initially, the adduct (BZ-TEMPO) obtained by reacting benzoyl peroxide, styrene, and 2,2,6,6-tetramethyl-piperidinyl-1-oxy (TEMPO) was isolated, characterised and hydrolysed. Conditions for the synthesis and hydrolysis of BZ-TEMPO were investigated and the hydrolysed product (HO-TEMPO) containing a primary hydroxyl group has been isolated in improved yield. The hydroxyl group of HO-TEMPO was coupled with tosylated PEG to yield the macroinitiator PEG terminated with a TEMPO unit (MPEG-TEMPO), which was further used to prepare the diblock copolymer PS-b-PEG by 'living' free radical polymerisation of styrene. The product was purified and identified by H-1 n.m.r. and GPC. However, large amounts of homopolystyrene was also formed by simultaneous thermal initiation and polymerisation. (C) 1997 Elsevier Science Ltd.

引用

页码：911 / 915

页数：5

共 27 条

[1] USE OF POLY(STYRENE)-BLOCK-POLY(ETHYLENEOXIDE) AS EMULSIFIER IN EMULSION POLYMERIZATION [J].