文章采用剪切粘度法对聚氯乙烯(PVC）/聚偏氟乙烯(PVDF)/聚甲基丙烯酸甲酯(PMMA)体系的相容性进行了研究，结果表明，该体系为部分相容体系，在此基础上采用稀溶液粘度法对各共混配比的相容性进行了预测。对相容性较好的PVC/PVDF/PMMA共混体系由相转化法制备了共混膜，并用扫描电镜，对共混膜的形态结构进行了观察。对共混膜的水通量、拉伸强度、伸长倍数和接触角进行了测量，发现共混改性后，共混膜的水通量、韧性及亲水性较PVC膜均有较大程度的提高。通过对不同组成共混膜的透水率和拉伸强度的比较，发现配比为6:1:3的共混膜水通量和拉伸强度都较好，因此该体系的最佳配比为6:1:3。

The miscibility of PVC/PVDF/PMMA blending system was investigated by the means of shearing viscosity. It was demonstrated that blended solution possessed partial miscibility. Then the dilute solution viscometry was used to determine the miscibility of all sorts of polymer blending ratio. PVC/PVDF/PMMA blend membranes were prepared by phase inversion. The micro-structure of blend membranes was analyzed by SEM and the water permeability, mechanical character and contact angle of blend membranes were measured too. The results showed that the water permeability, toughness, flexibility and the hydrophilicity of blend membranes were improved greatly compared to PVC membrane. It was obtained that both the permeability and tensile strength of blending membrane with the ratio of 6:1:3 were better. Therefore the optimizing blending ratio was 6:1:3.

[1] Bodzek M, Konieczny K. The influence of molecular mass of poly(vinyl chloride) on the structure and transport characteristics of ultrafiltration membranes[J]. J Membr Sci.1991, 61 (1~2): 131-156.
[2]武冠英,孙本惠. 铸膜液结构对聚氯乙烯超滤膜性能的影响[J].水处理技,1988,14(5):
271-277
[ ]李洁剑,赵玉琴,吕秀开等. 聚氯乙烯超滤膜及工业化[J]. 北京工业大学学报,1992,18 (2): 80-87.
[ ]叶晓,钱英,俞军等. 聚氯乙烯膜分离材料改性研究进展[J].膜科学与技术,2002, 22(4):72-74.
[ ]高以垣,马炳伦,李佩衍,等. 聚氯乙烯超滤膜及其稳定化[J].环境化学.1990,9(4):66-70.
[ ]邢丹敏,武冠英,胡家俊. 改性聚氯乙烯超滤膜的研究（Ⅱ）—共混改性膜性能的研究[J]. 膜科学与技术,1996,16(2):45-50.
[ ]邓晓玲,姜佩华,迟丽娜. 聚氯乙烯/聚砜共混中空纤维超滤膜的研制[J].东华大学学报,2003,29(5):104-107.
[ ]杨勇,罗川南,宋玉军. 聚氯乙烯合金分离膜研究进展[J].化工新型材料.1998,27(6).
[ ]赵晨阳,孙本惠,戴卫国,等.PVC/PMMA合金微滤膜的研制[J].中国塑料.2001,15(2):46-49.
[ ] Islam M A,Stoicheva R N,Dimov A.J. Membr.Sci.,1996,118:9
[ ]赵梓年,张楠. PVC/PVB共混超滤膜性能研究及应用[J].天津科技大学学报, 2007, 22(3): 36-39.
[ ]丁马太,余乃梅,何旭敏等. PVC/PAN 共混超滤膜的研究,Ⅱ.铸膜液组成对膜结构与性能的影响[J]. 水处理技术. 1991,17（5）:295~299.
[ ]丁马太,余乃梅,何旭敏等. PVC/PAN共混超滤膜的研究,Ⅲ.制膜工艺条件对共混超滤膜结构与性能的影响[J]. 水处理技术.1992,18(3):155~161.
[ ]李浩,奚旦立. 用正交设计研究PVDF/PVC/PMMA共混中空纤维膜. 膜科学与技术. 2007, 27(6):32-36.
[ ]戎静,奚旦立,李运清.聚偏氟乙烯/聚氯乙烯/聚甲基丙烯酸甲酯共混多孔中空纤维膜的制备与性能测试[J]. 工业用水与废水.2008,39(5):65-68.
[ ] Singh Y P, Singh R P. Compatibility studies on solutions of polymer blends by viscometric and ultrasonic techniques[J]. European Polymer Journal. 1983,19(6):535-541.
[ ]朱思君,王庆瑞. 聚醚砜/酚酞基聚醚砜共混相容性及凝胶特性研究[J]. 功能高分子学报. 2005,18(3):465-468.
[ ] Abdel-Azim A A, Boutros W Y, Abdel-Bary E M. Estimation of the compatibility of poly (ethylene glycol)/poly(ethylene oxide) blends from dilute solution viscosity measurements[J]. Polymer, 1998,39(10):2543-2549.
[ ] Rajai Baraka, Jamil K.J.Salem, Hani Hilles,et al. Itstudies on the effect of urea on the compatibility of PMMA/PVC mixtures in DMF by a dilute-solution viscometry method[J]. Chinese Journal of Polymer Science,2002,20(5):467-472.
[ ]迟莉娜,奚旦立,陈季华,等.高性能PVC/PSf共混超滤膜的研制—(Ⅰ)稀溶液粘度法测PVC/PSf共混相容性的研究[J].高分子材料科学与工程.2006,22(5):132-135.
[ ] Mathew M, Ninan K N, Thomas S. Compatibility studies of polymer-polymer systems by viscometric techniques: Nitrile-rubber based polymer blends[J]. Polym, 1998,39(24):
6235- 6239.
[ ]王淑梅,王湛,张新妙,等.PVDF/PMMA/CA共混膜的制备及性能研究[J].膜科学与技术. 2005,25(3):63-73.