Synthesis of carboxy-terminated telechelic oligostyrenes by Dead End Polymerization

被引:12
作者
David, G
Boutevin, B
Robin, JJ
Loubat, C
Zydowicz, N
机构
[1] Ecole Natl Super Chim Montpellier, CNRS, UMR 5076, Lab Chim Macromol, F-34296 Montpellier 05, France
[2] Univ Lyon 1, Lab Mat Polymeres & Biomat, CNRS, UMR 5627, F-69622 Villeurbanne, France
关键词
carboxy-telechelic polystyrene; Dead-End Polymerization; MALDI-TOF;
D O I
10.1002/pi.957
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Styrene was polymerized with 4,4'-azobiscyanovaleric acid (ACVA) in order to obtain carboxy-telechelic polystyrene (CTPS) using the Dead-End Polymerization (DEP) conditions. First, we focused on experimental conditions leading to oligomers with molecular weights about 2000 g mol(-1). Second, we demonstrated by-products of ACVA radicals are also synthesized in the DEP conditions by combination or by disproportionation. The purification of CTPS was investigated in order to extract the by-products of ACVA. An extraction of these by-products in H2O pH 7 is suggested. Finally, the acid functionality of oligostyrene is evaluated by H-1 NMR and conductimetric titrations. A functionality about 2 is obtained that confirmed the synthesis of CTPS. Copyright (C) 2002 Society of Chemical Industry.
引用
收藏
页码:800 / 807
页数:8
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