东南大学学报（英文版）2019，Vol.35Issue(2)：264-268,5.DOI:10.3969/j.issn.1003-7985.2019.02.018
聚醋酸乙烯酯的合成及其在超临界二氧化碳中的相行为
Synthesis of poly (vinyl acetate) oligomers and their phase behavior in supercritical carbon dioxide
摘要
Abstract
Three poly (vinyl acetate) (PVAc) oligomers with controlled molecular weight and narrow molecular distribution are synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization.The effects of the reaction temperature and the added amount of initiator of the PVAc polymerization are discussed.In addition,the phase behavior of the prepared PVAc in pressured CO2 is determined via the cloud point method.The results indicate that the cloud point of PVAc increases with the increase in the molecular weight,the PVAc concentration,and the temperature.The cloud point pressures for the PVAc mass concentration of 0.12 ％ with the molecular weight of 1 550,2 120,and 2 960 g/mol are 13.48,13.83 and 15.43 MPa,respectively,at the temperature of 35 ℃.It reveals that the solubility of PVAc in ScCO2 at relatively low pressure is remarkably limited.关键词
聚醋酸乙烯酯/聚合反应/超临界二氧化碳/浊点压力/亲二氧化碳聚合物Key words
poly (vinyl acetate)/polymerization/supercritical carbon dioxide/cloud point pressure/CO2-philic polymer分类
化学化工引用本文复制引用
焦真,宋俊颖,樊文景,王秀东,王梓屹..聚醋酸乙烯酯的合成及其在超临界二氧化碳中的相行为[J].东南大学学报（英文版）,2019,35(2):264-268,5.基金项目
The Natural Science Foundation of Jiangsu Province (No.BK20130602),the Applied Basic Research Program of Suzhou (No.SYG201836),the Project of the Collaborative Innovation Center of Suzhou Nano Science and Technology. （No.BK20130602）
