POLYMERIZATION OF ACRYLIC ACID IN SUPERCRITICAL CARBON DIOXIDE

HU Hongqi; CHEN Mingcai; LI Jing; CONG Guangmin

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POLYMERIZATION OF ACRYLIC ACID IN SUPERCRITICAL CARBON DIOXIDE

Research Bulletin | 更新时间：2021-03-19

- POLYMERIZATION OF ACRYLIC ACID IN SUPERCRITICAL CARBON DIOXIDE
- Acta Polymerica Sinica Issue 6, Pages: 740-743(1998)
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- Published：20 December 1998，
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HU Hongqi, CHEN Mingcai, LI Jing, CONG Guangmin. POLYMERIZATION OF ACRYLIC ACID IN SUPERCRITICAL CARBON DIOXIDE. [J]. Acta Polymerica Sinica (6):740-743(1998)
DOI：

HU Hongqi, CHEN Mingcai, LI Jing, CONG Guangmin. POLYMERIZATION OF ACRYLIC ACID IN SUPERCRITICAL CARBON DIOXIDE. [J]. Acta Polymerica Sinica (6):740-743(1998) DOI：

摘要

化学工业中的各种有机溶剂对环境造成了严重的污染

因此探索无毒无污染的溶剂体系意义重大．近年来

以超临界ＣＯ２作为有机反应及聚合反应介质的研究得到了发展［１］．超临界ＣＯ２作为聚合反应介质有许多优点

无毒、价廉、传质和传热速度快、由于惰性而不会引发链转移、对单体和聚合物的溶解能力可较为方便地通过温度和压力进行调节；通过减压即可实现反应分离一体化．然而到目前为止

发现能很好地溶解于超临界ＣＯ２?...

Abstract

Precipitation polymerization of acrylic acid in supercritical CO2 is studied. The effect of the temperature

the pressure of CO2

the concentration of the monomer and the initiator ae explored. It shows that the decrease of the concentration of the monomer

the increase of the pressure of CO2

the decrease of the temperature of the increase of the concentration of the initiator will all decrease the molecular weight of the product. The scanning electron micrographs indicate that the water-soluble polyacrylic acid powder obtained from this experiment is formed by primary particles of about 1～2 μ m size.In addition

the pressure increases with the increasing of the yield

it is speculaed to be due to the separation of phases during polymerization.

关键词

超临界ＣＯ２丙烯酸聚合反应

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