Precipitation polymerization of 2-hydroxyethyl methacrylate in supercritical carbon dioxide

被引：10
|
作者：
Wang, Xiao-Hu [1 ]
Cao, Li-Qin [1 ]
Zhang, Li-Juan [1 ]
Wang, Ji-De [1 ]
机构：
[1] Xinjiang Univ, Key Lab Oil & Gas Fine Chem, Minist Educ, Urumqi 830046, Peoples R China
来源：
POLYMERS FOR ADVANCED TECHNOLOGIES | 2012年 / 23卷 / 03期
基金：
中国博士后科学基金;
关键词：
2-hydroxyethyl methacrylate; radical polymerization; precipitation polymerization; molecular weight; supercritical carbon dioxide; DISPERSION POLYMERIZATION; POLY(2-HYDROXYETHYL METHACRYLATE); ACRYLIC-ACID; RADICAL POLYMERIZATION; N-ISOPROPYLACRYLAMIDE; MOLECULAR-WEIGHT; KINETICS; COPOLYMERIZATION; ACRYLATE);
D O I：
10.1002/pat.1909
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We report the successful precipitation polymerization of 2-hydroxyethyl methacrylate (HEMA) in supercritical carbon dioxide (scCO2) at pressures ranging from 15 to 27 MPa utilizing 2, 2'-azobisisobutyronitrile (AIBN) as a free radical initiator. The effects of the reaction pressure, initiator concentration, monomer concentration, reaction temperature, and reaction time were investigated. Analyses by scanning electron microscopy (SEM) indicated that in all reaction conditions, polymerization in the absence of stabilizer led to the formation of large aggregates of partially coalesced particles, with diameters of approximate 110 mu m. Analyses by gel permeation chromatography (GPC) indicated that for the reaction pressure, initiator concentration, monomer concentration, reaction temperature, and reaction time studied there are appreciable effect on product molecular weight. Copyright (C) 2011 John Wiley & Sons, Ltd.
引用
收藏
页码：529 / 533
页数：5
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