Improving solubility of polyimide using hydroxyl group containing comonomer
발표자
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초록
내용
Polyimides (PIs) is used in various fields due to their high mechanical and thermal properties. However, the insolubility of PIs hampers their applications, and there have been continuous efforts to improve the processability of PIs. One of the examples is incorporating non-linear bridging units into the polymer chains. The PI from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA)/4,4'-oxydianiline (ODA) has been reported to have improved, yet inconsistent, solubility in many organics solvents. In this study, we synthesized PI copolymers with 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (Bis-ap-af) as a comonomer. The hydroxyl group in Bis-ap-af was expected to enhance the solubility. The structure was confirmed using spectroscopic analysis and the thermal, optical, and mechanical properties were analyzed. The solubility of the PI copolymers in various solvents was determined to show their improved solubility with Bis-ap-af content.