METHOD FOR CONTROLLING POLYIMIDE BACKBONE STRUCTURE AND METHOD FOR PRODUCING POLYIMIDE

摘要

This method for controlling a polyimide backbone structure comprises, during the formulation of a polyimide by reaction between a diamine component and (1S,2R,4S,5R)-cyclohexane tetracarboxylic dianhydride in an organic solvent containing an aprotic amide solvent and a lactone solvent, adjusting at least one of reaction conditions which are the mass ratio of the aprotic amide solvent and the lactone solvent, the reaction temperature, the reaction time, and the amount of the aprotic amide solvent, and converting a cis structure derived from (1S,2R,4S,5R)-cyclohexane tetracarboxylic dianhydride in the produced polyimide into a trans structure derived from (1R,2S,4S,5R)-cyclohexane tetracarboxylic dianhydride, depending on the reaction condition, to control the proportion of the trans structure.