An Investigation of Free-Radical Copolymerization Propagation Kinetics of Styrene and 2-Hydroxyethyl Methacrylate

被引：50

作者：

Liang, Kun ^{[1
]}

Dossi, Marco ^{[2
]}

Moscatelli, Davide ^{[2
]}

Hutchinson, Robin A. ^{[1
]}

机构：

[1] Queens Univ, Dept Chem Engn, Kingston, ON K7L 3N6, Canada

[2] Politecn Milan, Dipartimento Chim Mat & Ingn Chim Giulio Natta, I-20131 Milan, Italy

来源：

MACROMOLECULES | 2009年 / 42卷 / 20期

基金：

加拿大自然科学与工程研究理事会;

关键词：

EVALUATED RATE COEFFICIENTS; RELIABLE THEORETICAL PROCEDURES; AB-INITIO CALCULATION; METHYL-METHACRYLATE; HYDROGEN ABSTRACTION; BUTYL METHACRYLATE; POLYMERIZATION; DEPROPAGATION; THERMOCHEMISTRY; PREDICTION;

D O I：

10.1021/ma901355u

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Frce-radical copolymerization propagation kinetics of styrene (ST) and 2- hydroxyethyl methacrylate (HEMA) have been investigated using pulsed laser polymerization (PLP) combined with size exclusion chromatography (SEC) and proton NMR. Monomer reactivity ratios for bulk ST/HEMA copolymerization are r(HEMA) = 0.49 and r(ST) = 0.27, with no significant variation with temperature found;T between 50 and 120 degrees C. The composition-averaged copolymerization propagation rate coefficient, k(p,cop), is well represented by the implicit penultimate unit effect (IPUE) model. The copolymerization kinetics of HEMA with ST is quite similar to that of glycidyl methacrylate (GM A) with ST. A computational study based oil quantum chemistry supports the finding that GMA and HEMA are more reactive toward ST radicals compared to alkyl methacrylates.

引用

页码：7736 / 7744

页数：9

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