Design of subnanospace/affinity-controlled polymers and development of next-generation high-performance gas-separation membranes

合成了具有极性基团和扭曲取代基的聚乙炔，并对其透气性进行了研究。携带磺酸和咪唑盐基团的聚合物表现出高的二氧化碳选择性，因为这种聚合物选择性地溶解二氧化碳。含有扭曲取代基的聚合物表现出较高的透氧性。用准弹性中子散射的方法研究了具有多甲基化的聚乙炔的局部迁移率。在几十皮秒的时间尺度上，随着局部迁移率的增加，气体渗透率成比例地增加。考察了取代聚乙炔的透气性随时间的变化。以聚（1-三甲基硅基-1-丙炔）为代表的高透气性聚乙炔，由于材料的吸收和弛豫现象，透气性随时间的推移而显著降低。

Polyacetylenes having polar groups and twisted substituents were synthesized and their gas permeability was investigated. Polymers carrying sulfonic acid and imidazolium salt moieties exhibited high carbon dioxide permselectivity because such polymers dissolved carbon dioxide selectively. Polymers bearing twisted substituents displayed high oxygen permeability.The local mobility of polyacetylenes having polymethylated indan moieties was studied by means of quasi-elastic neutron scattering. As the local mobility in the time scale of several tens of picosecond increased, gas permeability increased proportionally.The time dependence of gas permeability in substituted polyacetylenes was examined. Highly gas permeable polyacetylenes as represented by poly(1-trimethylsilyl-1-propyne) showed a considerable decrease in gas permeability with time owing to materials absorption and relaxation phenomenon.