This invention discloses novel membranes comprised of a Send of polyarylate and polybenzimidazole polymers. A membrane prepared from the blend of polybenzimidazole and polyarylate polymers exhibits enhanced properties over membranes prepared solely from either a polyarylate or a polybenzimidazole polymer. The addition of the polyarylate to the polybenzimidazole membrane allows the composition to be more thermally processable and less susceptible to moisture. The presence of the polybenzimidazole renders the polyarylate less reactive to solvents and increases its thermal stability. In addition, it has been surprisingly found that membranes prepared from the polybenzimidazole polyarylate blends show high regeneration capacity while retaining good flux ranges. The membranes prepared by this process exhibit good separation characteristics and provide an improved membrane with enhanced qualities over prior art membranes.
本发明公开了由聚芳酸酯和聚
苯并咪唑聚合物组成的新型膜。由聚
苯并咪唑和聚芳酸酯聚合物混合物制备的膜与仅由聚芳酸酯或聚
苯并咪唑聚合物制备的膜相比,具有更强的性能。在聚
苯并咪唑膜中加入聚芳酸酯,可使组合物更易于热加工,且不易受潮。聚
苯并咪唑的存在降低了聚芳酸酯对溶剂的反应性,提高了其热稳定性。此外,我们还惊喜地发现,用聚
苯并咪唑聚芳酸酯混合物制备的膜具有很高的再生能力,同时还能保持良好的通量范围。通过该工艺制备的膜具有良好的分离特性,与现有技术的膜相比,其质量得到了提高。