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本文研究了聚甲基丙烯酸甲酯(PMMA)在四氯化碳/甲醇、乙腈/甲醇、氯仿/甲醇和苯/甲醇等共溶剂中的溶液性质.用粘度法测定了上述各二元共溶剂体系对 PMMA 的溶解性能,得到了各二元共溶剂体系在适当比例时对 PMMA 的最好溶解性,即在[η]～φ_1曲线上均出现一个[η]的极大值,还用折射率方法,测定了在恒温恒压下上述四组共溶剂体系在溶入 PMMA 前后气相组成的变化,以求得液相成份的变化差值,并用于表征选择性吸附量随共溶剂组成变化的情况,从而得到选择性吸附曲线.在上述实验的基础上用“选择性分子间引力”观点从分子结构和电性特征对共溶剂对 PMMA 的溶解机理——选择性作用和协同效应——作了更深入的理论解释.
In this paper, the solution properties of polymethylmethacrylate (PMMA) in carbon tetrachloride / methanol, acetonitrile / methanol, chloroform / methanol and benzene / methanol were investigated.The viscosity of each binary cosolvent The solubility of PMMA in the system was obtained, and the best solubility of PMMA in each binary system was obtained. The maximum [η] appeared on [η] ~ φ_1 curve, Rate method, the gas phase composition of the four co-solvent systems dissolved in PMMA at constant temperature and constant pressure was measured in order to obtain the variation of the liquid phase composition and to characterize the change of the selective adsorption capacity with the composition of the co-solvent And then get the selective adsorption curve.On the basis of the above experiments, the mechanism of selective dissolution and synergistic effect of cosolvent on PMMA was studied from the perspective of molecular structure and electrical characteristics A more in-depth theoretical explanation.