混合溶剂／高分子系统汽液平衡测定

建立了一套石英弹簧称重法测定混合剂高分子溶液汽液平衡的实验装置，实验结果表明，采用多个样品池增加溶剂吸收量、利用汽相ｐＶＴ数据测量值并结合物料衡算求得平衡时的汽液相组成的方法，可减小实验误差，汽液相的误差小于５％。用该装置测定了丁酮／甲苯／聚甲基丙烯酸甲酯（ＰＭＭＡ）和丁酮／丙酮／ＰＭＭＡ两个三元系在３０８．１５Ｋ下的汽液平衡数据。结果显示，由于甲苯的加入，丁酮在ＰＭＭＡ中的溶解性有了提高，而丁酮

Measurement of Vapor liquid Equilibrium of the Mixed Solvent/Polymer Ternary Systems

Vapor liquid equilibria of mixed solvent/polymer ternary systems based on quartz spring weighing method were measured. In order to decrease the measuring error, 21 baskets containing polymer powder, one of them was hanged at the end of quartz spring to weigh the amount of mixed solvent absorbed by unit polymer sample, were used to increase the total amount of mixed solvent being adsorbed. The quantity of mixed solvent in vapor phase was calculated from the pVT data measurement of vapor phase. Both liquid and vapor phase composition were then determined by material balance. The vapor liquid equilibrium data for butanone/toluene/PMMA and butanone/acetone/PMMA systems at 308.15K have been measured. It is shown that the solubility of butanone in PMMA is enhanced due to the existence of toluene, while the solubility of toluene in PMMA will be lowered by adding butanone to the solution. The solubility behaviors of acetone and butanone in butanone/acetone/PMMA ternary system is similar to that in binary polymer solutions.