Effects of ionization on the reaction behavior and kinetics of acrylic acid polymerizations

被引：30

作者：

Anseth, KS ^{[1
]}

Scott, RA ^{[1
]}

Peppas, NA ^{[1
]}

机构：

[1] PURDUE UNIV,SCH CHEM ENGN,W LAFAYETTE,IN 47907

来源：

MACROMOLECULES | 1996年 / 29卷 / 26期

关键词：

D O I：

10.1021/ma960840r

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 kinetics of acrylic acid (AA) solution polymerization was investigated by polymerizing 30 wt % aqueous AA solutions at pH values ranging from 2.2 to 9.9. The polymerization rate was determined with differential photocalorimetry and was found to be a strong function of the solution pH and the ionic strength. Al though the polymerization rate decreased with increasing pH below pH 6.5, an increase in the polymerization rate was observed as the pH Nas raised further, due to reduction in electrostatic repulsion. The propagation and termination constants were measured using an after-effect technique and were shown to depend strongly on monomer conversion, solution pH, and ionic strength.

引用

页码：8308 / 8312

页数：5

共 20 条

[1] POLYMERIZATION KINETICS AND VOLUME RELAXATION BEHAVIOR OF PHOTOPOLYMERIZED MULTIFUNCTIONAL MONOMERS PRODUCING HIGHLY CROSS-LINKED NETWORKS [J].