摘要
研究了聚合物－超临界二氧化碳二元体系溶解性，并考查了添加共溶剂对溶解性的影响，结果表明，添加共溶剂会大大提高ＣＯ２的溶解度．此外，还研究了聚合物－溶剂－超临界二氧化碳三元体系在高压时的相行为，探讨了组分性质、含量等对温度 压力相图的影响．随着ＣＯ２含量的增加，压力－温度相图Ｌ－ＬＶ（单一液相向液气两相共存）边界线的斜率会出现突变点，发生由Ｌ－ＬＶ边界线向Ｌ－ＬＬ（单一液相向液液两相共存）边界线的过渡，而Ｌ－ＬＶ边界线对不同聚合物并不敏感．
The solubility of polymer-supercritical CO2 binary systems was studied, and the effects of co-solvent on the solubility were discussed. The polymers used in this experiment were from commercial coating resins, and AR toluene and cyclohexane produced domestically were used as co-solvent. The results show that the addition of co-solvent increases the solubility remarkably (see Tab. I) The high-pressure phase behavior of polymer-solvent-supercritical CO2 ternary systems was also investigated experimentally. The effects of component's character and their concentration on p - T phase diagram were discussed. It was found that as CO2 concentration increases, the diagram changed from L-LV boundary to steeper L-LL boundary. the L-LV boundary was not sensitive to different polymers.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2001年第8期757-760,共4页
Acta Physico-Chimica Sinica
基金
北京市自然科学基金资助项目(2992015)
