| 聚合物-溶剂-超临界CO2三元体系的相行为 |
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| 引用本文： | 曹维,刘鑫,张敬畅. 聚合物-溶剂-超临界CO2三元体系的相行为[J]. 物理化学学报, 2001, 17(8): 757-760. DOI: 10.3866/PKU.WHXB20010819 |
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| 作者姓名： | 曹维 刘鑫 张敬畅 |
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| 作者单位： | College of Science, Beijing University of Chemical Technology, Beijing 100029 |
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| 基金项目： | 北京市自然科学基金资助项目(2992015) |
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| 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.
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| 关 键 词： | 溶解度 超临界CO2 相行为 |
| 收稿时间： | 2001-01-10 |
| 修稿时间： | 2001-01-10 |
Phase Behavior of Polymer-Solvent-Supercritical CO2 Ternary System |
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| Cao Wei-Liang,Liu Xin,Zhang Jing-Chang. Phase Behavior of Polymer-Solvent-Supercritical CO2 Ternary System[J]. Acta Physico-Chimica Sinica, 2001, 17(8): 757-760. DOI: 10.3866/PKU.WHXB20010819 |
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| Authors: | Cao Wei-Liang Liu Xin Zhang Jing-Chang |
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| Affiliation: | College of Science, Beijing University of Chemical Technology, Beijing 100029 |
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| Abstract: | 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. 1).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. |
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| Keywords: | Solubility 2',') " >Supercritical CO2 Phase behavior |
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