The invention relates to the preparation of a crosslinked polymeric film bearing ionic groupings.
The process consists in extruding a material comprising at least one prepolymer, in polymerizing said material after extrusion, and in subjecting the extruded material to a chemical reaction for grafting ionic groupings. The prepolymer comprises repeating units each comprising at least one aromatic group GA and at least one functional group GF; it bears at least one group GP which is polymerizable thermally at a temperature greater than the extrusion temperature, or photochemically, and also at least one reactive group GR which allows the grafting of ionic groupings.
The films are useful as a membrane for fuel cells or electrodialysis, as an electrolyte of a lithium battery, of a supercapacitor or of an electrochromic device, or as an ion exchange membrane.
该发明涉及制备带有离子基团的交联聚合物薄膜的方法。该过程包括挤出至少含有一种预聚物的材料,挤出后聚合该材料,并将挤出的材料经过
化学反应接枝离子基团。预聚物包括重复单元,每个单元包括至少一个芳香基团GA和至少一个功能基团GF;它带有至少一个在挤出温度以上的温度下可以热聚合或光
化学聚合的可聚合基团GP,以及至少一个反应基团GR,允许接枝离子基团。这些薄膜可用作燃料电池或电渗析的膜、
锂电池、超级电容器或电致变色装置的电解质,或离子交换膜。