MOLECULAR MICROSTRUCTURE OF THE ETHYL BRANCH SEGMENTS IN POLY(VINYL CHLORIDE)

被引：25

作者：

STARNES, WH ^{[1
]}

WOJCIECHOWSKI, BJ ^{[1
]}

VELAZQUEZ, A ^{[1
]}

BENEDIKT, GM ^{[1
]}

机构：

[1] BF GOODRICH CO,CTR RES & DEV,BRECKSVILLE,OH 44141

来源：

MACROMOLECULES | 1992年 / 25卷 / 14期

关键词：

D O I：

10.1021/ma00040a006

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Carbon-13 NMR examination of reductively dechlorinated poly(vinyl chloride) at a field strength of 125.77 MHz reveals that the ethyl branches in the unreduced polymer are 1,2-dichloroethyl rather than 2-chloroethyl when the polymerization is carried out in an aqueous suspension at 40 or 82-degrees-C. The 1,2-dichloroethyl moieties occur in a -CHClCH2CH(CHClCH2Cl)CH2CHCl- arrangement that results from a head-to-head emplacement of monomer and two successive 1,2 chlorine shifts. These shifts comprise a "billiard-ball" pathway for free-radical polymerization that apparently is without precedent.

引用

页码：3638 / 3641

页数：4

共 21 条

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