The relationship between structural features and selective transport properties of a polymer remains to be the topic of major interest among the scientists working in the field of membrane materials development. In the present work the structural and morphological features of the sulfonated co-polyimide and their role in the realisation of its selective transport properties are discussed. The features of the macromolecular chain having limitedly flexible -O-Ph-O- fragment and their influence on the properties of the material are studied with X-Ray diffraction analysis and differential scanning calorimetry. Microphase separated morphology of the block-co-polyimide was detected by the means of atomic force microscopy in the lateral force contrast mode. Theoretical and practical studies on the influence of the counterion nature on the block-copolymer morphology are conducted. Transport properties of the co-polyimide were investigated in the processes of pervaporation and gas separation. Morphological features of the copolymer allow the realisation of the selective fixed-site carrier facilitated transport in terms of pervaporation separation of various binary methanol mixtures. The polymer showed good separation performance in application to pervaporation separation of close to azeotropic MeOH/DMC and MeOH/DME mixtures reaching selectivity values close to 4. The relationship between real and ideal separation selectivities during PV of the studied mixtures are established. The lamellar-like morphology of the studied co-polyimide along with its other unique properties makes it perspective in application to fixed-site carrier facilitated pervaporation and gas separation membranes development.

聚合物的结构特征与选择性传输性质之间的关系仍然是膜材料开发领域的科学家们最感兴趣的话题。在本工作中，讨论了磺化共聚酰亚胺的结构和形态特征及其在实现其选择性传输性质中的作用。用X射线衍射分析和差示扫描量热法研究了具有有限柔性的-O-Ph-O-片段的大分子链的特征及其对材料性能的影响。通过原子力显微镜以横向力对比模式检测嵌段共聚酰亚胺的微相分离形态。对抗衡离子性质对嵌段共聚物形态的影响进行了理论和实践研究。在全蒸发和气体分离过程中研究了共聚酰亚胺的传输性质。就各种二元甲醇混合物的全蒸发分离而言，共聚物的形态学特征允许实现选择性固定位点载体促进的运输。在接近共沸的MeOH / DMC和MeOH / DME混合物的全蒸发分离中，该聚合物表现出良好的分离性能，达到接近4的选择性值。建立了所研究混合物PV时实际和理想分离选择性之间的关系。