CA-DMF-水三元制膜液体系相分离的研究

Study on Phase Seperation in the Ternary System of CA-DMF-Water Membrane Casting Solution

用浊点滴定法研究了具有不同聚合物浓度的CA-DMF-水三元制膜液体系分别在30.0、45.0、60.0℃下的相分离情况,得到该体系在各相应温度下的三元相图,发现,所得到的三元相图尤其在高聚合合物浓度区域与Strathmann三元相图有重大的差异、并就此进行了讨论。

The phase diagrams of CA-DMF-water ternary system at 30. 0℃, 45. 0℃ , 60. 0℃ were determined by titrating water into different concertration of CA-DMF solutions until the first permanent turbidity at corresponding temperature was obtained. An obvious difference between above phase diagrams and Strathmann's phase diagram, especially at high concertration area,was found and discussed.