COMPOSITIONAL SEQUENCE DETERMINATION OF ACRYLONITRILE-BUTYL ACRYLATE COPOLYMERS BY C-13 NMR-SPECTROSCOPY

被引：23

作者：

BRAR, AS

SUNITA

机构：

[1] Department of Chemistry, Indian Institute of Technology, New Delhi, 110 016, Hauz Khas

来源：

POLYMER | 1993年 / 34卷 / 16期

关键词：

COPOLYMERS; MONOMER STRUCTURE; SPECTROSCOPY;

D O I：

10.1016/0032-3861(93)90466-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-butyl acrylate (A/B) copolymers of different monomer compositions were prepared by bulk polymerization using a free radical initiator. Copolymer compositions were determined by elemental analyses and comonomer reactivity ratios were determined using a non-linear least squares errors-in-variables model. Terminal and penultimate reactivity ratios were calculated using the observed monomer triad sequence distribution determined from C-13{H-1} n.m.r. spectra. The triad sequence distribution was used to calculate diad concentrations, conditional probability parameters, number-average sequence lengths and block character of the copolymers. The observed triad sequence concentrations determined from C-13{H-1} n.m.r. spectra agreed well with those calculated from reactivity ratios.

引用

页码：3391 / 3396

页数：6

共 14 条

[1] DETERMINATION OF MICROSTRUCTURE AND GLASS-TRANSITION TEMPERATURE OF ACRYLONITRILE METHYL ACRYLATE COPOLYMERS BY C-13-NMR SPECTROSCOPY [J].