Preparation and Properties of Mechanically Robust, Colorless, and Transparent Aramid Films.

ABSTRACT: In this study, various diamine monomers were used to synthesize aramid polymer films via a low-temperature solution condensation reaction with diacid chloride. For diamines with relatively high basicity, the reaction system became opaque because amine salt formation inhibited polymer synthesis. Meanwhile, low-basicity diamines with strong electron-withdrawing groups, such as CF₃ and sulfone, were smoothly polymerized without amine salt formation to provide highly viscous solutions. The acid byproduct HCl generated during polymerization was removed by adding propylene oxide to the reaction vessel and converting the acid into highly volatile inert substances. The resulting solutions were used as varnishes without any additional purification, and polymer films with an excellent app

SUBMITTER: Kim H 

PROVIDER: S-EPMC10935007 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature