基于Flory-Huggins高分子溶液理论,计算了聚砜(PSF)-二甲基乙酰胺(DMAc)-非溶剂铸膜体系的三元相图,其中二甲基乙酰胺(DMAc)为溶剂,水、甘油、乙醇和正己烷为非溶剂.通过相图分析了不同非溶剂对凝胶时间的影响,同时考虑了扩散的影响.根据计算结果得到如下结论:双节线或旋节线与聚合物-溶剂轴的距离越近,凝胶时间越短;非溶剂与溶剂的相互扩散速度越快,凝胶时间越短;联结线的斜率越小,即分相时聚合物稀相中非溶剂的量越少,凝胶时间越短.
参考文献
| [1] | Boom R M;Wienk I M;Boomgaard T V (D) et al.Microstructures in phase-inversion membranes,part 2:The role of a polymeric additive[J].Journal of Membrane Science,1992,73:277-292. |
| [2] | Smolders C A;Reuversa J;Boom R M et al.Microstructures in phase-inversion membranes,part 1:IFormation of macrovoids[J].Journal of Membrane Science,1992,73:259-275. |
| [3] | Tompa H.Polymer solutions[M].London:Butterworths,1956 |
| [4] | Flory P J.Principles of polymer chemistry[M].Ithaca,New York:Cornell University Press,1953 |
| [5] | Altena F W;Smolders C A .Calculation of liiuid-liquid phase separation in a ternary system of a polymer in mixture of solvent and nonsolvent[J].Macromolecules,1982,15(06):1491-1497. |
| [6] | Yilmaz L;Mchugha J .Analysis of nonsolvent-solvent-polymer phase diagrams and their relevance to membrane formation modeling[J].Journal of Applied Polymer Science,1986,31(04):997-1018. |
| [7] | Cheng L P;Dwana W;Gryte C C .Isothermal phase behavior of nylon-6,-66 and -610 polyamides in formic acid-water systems[J].Journal of Polymer Science Part B:Polymer Physics,1994,32(07):1183-1190. |
| [8] | Hansen C M.Hansen solubility parameters[M].Boca Raton,FL:CRC Press,2000 |
| [9] | Grulke E A.Solubility paramter values[M].New York:John Wiley and Sons,Inc,1999:675-714. |
| [10] | Yaws C L.Chemical properties handbook[M].北京:世界图书出版公司北京公司;McGraw-Hill,1999 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%