Monomer reactivity ratios and microstructural analysis of 2-hydroxyethyl methacrylate-t-butyl acrylate copolymers

被引：13

作者：

Martínez, G

Sánchez-Chaves, M

Madruga, EL

Fernández-Monreal, C

机构：

[1] CSIC, Inst Ciencia & Tecnol Polimeros, Madrid 28006, Spain

[2] Univ Complutense, Fac Ciencias Quim, Dept Quim Organ 1, Madrid 28040, Spain

来源：

POLYMER | 2000年 / 41卷 / 15期

关键词：

2-hydroxyethyl methacrylate/t-butyl acrylate/DMF copolymerization; monomer reactivity ratios; H-1; NMR;

D O I：

10.1016/S0032-3861(00)00019-7

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The copolymerization reaction between 2-hydroxyethyl methacrylate and t-butyl acrylate in a 3 mol l(-1) N, N'-dimethylformamide solution at 50 degrees C, using 2,2'azobis(isobutyronitrile) as initiator was carried out and values of r(HEMA) = 1.792 and r(TBA) = 0.510 were found for the monomer reactivity ratios. High-resolution H-1 NMR spectra of copolymers have been analyzed in terms of sequence distribution and stereoregularity. The alpha-CH3 resonance region contains five resonating peaks due to its sensitivity to triad concentrations. From these signals, triad concentrations were determined and its comparison with those calculated from Bernouillian statistics confirms the obtained results. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：6021 / 6026

页数：6

共 19 条

[11] BLOCK-COPOLYMERS BY SEQUENTIAL GROUP-TRANSFER POLYMERIZATION - POLY(METHYL METHACRYLATE)-BLOCK-POLY(2-ETHYLHEXYL ACRYLATE) AND POLY(METHYL METHACRYLATE)-BLOCK-POLY(TERT-BUTYL ACRYLATE) [J].