Controlled synthesis and solution behavior of macrocyclic poly[(styrene)-b-(ethylene oxide)] copolymers

被引：0
作者：
Cramail, S [1 ]
Schappacher, M [1 ]
Deffieux, A [1 ]
机构：
[1] Univ Bordeaux 1, Lab Chim Polymeres Org, ENSCPB, CNRS, F-33402 Talence, France
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2000年 / 201卷 / 17期
关键词：
D O I：
10.1002/1521-3935(20001101)201:17<2328::AID-MACP2328>3.0.CO;2-R
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A series of cyclic poly[(styrene)-b-(ethylene oxide)] diblock copolymers 4 (1.5 kg/mol < <(M)over bar>(n) < 1.1 kg/mol) with narrow molecular weight distributions (I <less than or equal to> 1.12) have been synthesized. They were obtained by intramolecular cyclization of linear a-diethyl acetal-omega -styrenyl poly(styrene ethylene oxide) 3, under high dilution conditions. The use of well-defined linear precursors in association with a cyclization process based on an unimolecular end-to-end coupling reaction allows the formation of macrocyclic diblocks in high yield (more than 90%). The structural characterization and the solution behavior of both the linear and cyclic amphipathic diblock copolymers have been investigated by means of NMR, size exclusion chromatography, and viscosimetry.
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收藏
页码：2328 / 2335
页数：8
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