DETERMINATION OF COMPOSITIONAL AND CONFIGURATIONAL SEQUENCE DISTRIBUTION OF ACRYLONITRILE METHYL-METHACRYLATE COPOLYMERS BY C-13 NMR-SPECTROSCOPY

被引：27

作者：

KAPUR, GS ^{[1
]}

BRAR, AS ^{[1
]}

机构：

[1] INDIAN INST TECHNOL,DEPT CHEM,NEW DELHI 110016,INDIA

来源：

POLYMER | 1991年 / 32卷 / 06期

关键词：

ACRYLONITRILE; METHYL METHACRYLATE; HARWOOD PROGRAM; COTACTICITIES; CONFIGURATIONAL PROBABILITIES;

D O I：

10.1016/0032-3861(91)90600-N

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Acrylonitrile-methyl methacrylate (AM) copolymers of different monomer concentrations were prepared in bulk by free radical initiation. C-13 n.m.r. spectra of several acrylonitrile-methyl methacrylate copolymers are discussed in terms of their triad monomer sequence and cotacticity. Terminal and penultimate reactivity ratios were calculated using the observed monomer triad sequence distribution obtained from C-13 n.m.r. spectra. Triad sequence distributions were used to calculate diad concentrations, probability parameters, number average sequence lengths and the comonomer mole fractions in the copolymers. The experimental fractions of all the ten A centred and ten M centred triad cotactic sequences were found to be in excellent agreement with those calculated using the probabilities parameters.

引用

页码：1112 / 1118

页数：7

共 15 条

[1] MICROSTRUCTURE OF COPOLYMERS OF METHYL-METHACRYLATE WITH ETHYL METHACRYLATE [J].