1. Preparation and characterization of soluble heat-resistant polyimide films containing bis-N-phenyl-benzimidazole.
- Author
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Li, Dandan, Wang, Chengyang, Ma, Shengqi, Zhou, Hongwei, and Lu, Ran
- Subjects
POLYIMIDE films ,POLYIMIDES ,BENZIMIDAZOLES ,HIGH temperatures ,IMIDES ,MOIETIES (Chemistry) ,SOLUBILITY - Abstract
To prepare soluble polyimides with high temperature resistance, two new diamine monomers, namely, 2,2
′ -(4,4′ -oxybisphenylene)-bis(1-phenyl-5-aminobenzimidazole) (5a), and 2,2′ -(4,4′ -hexafluoroisopropylidene)-bis(1-phenyl-5- aminobenzimidazole) (5b), were synthesized and exploited to prepare three series of poly(benzimidazole imides)s (PBIIs) by a conventional two-stage synthesis. The resulting PI films were flexible and tough, possessing high glass-transition temperatures (Tg s = 311°C–390°C), improved optical transparency, and excellent solubility. Moreover, the effect of different configuration on performance was revealed, and these data provided a feasible method to enhance both Tg and solubility of PIs by incorporating N-phenyl benzimidazole and corresponding functional moieties. [ABSTRACT FROM AUTHOR]- Published
- 2022
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