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- W3081777038 endingPage "122963" @default.
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- W3081777038 abstract "The development of thermostable polyimides (PIs) is urgently required for application in traditional aerospace and newly designing flexible-display substrates. The root to obtain intrinsic heat-resistant PIs is to seek novel monomers. Based on the high bond energy of quinoxaline, several quinoxaline diamines, including 3/2-(4-aminophenyl)-2/3-quinoxalin-6-amine (QHDA), 3/2-(4-aminophenyl)-2/3-phenyl quinoxalin-6-amine (QBDA), and 3/2-(4-aminophenyl)-2/3-methylquinoxalin-6-amine (QMDA) were synthesized, and the corresponding PI films were prepared with four aromatic dianhydrides. The introduction of a quinoxaline moiety provided the PI films with excellent thermal properties and an advanced mechanical performance. The QHDA-PIs possessed a high thermal stability with a 5% mass-loss temperature (Td5%) of 528–560 °C, a glass-transition temperature (Tg) of 413–444 °C and a low coefficient of thermal expansion (CTE) of 1 ppm/K for QHDA-m because of its better linearity and closer packing. This study established design rules to tune the properties of quinoxaline PIs by side-group modification." @default.
- W3081777038 created "2020-09-08" @default.
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- W3081777038 date "2020-11-01" @default.
- W3081777038 modified "2023-10-15" @default.
- W3081777038 title "High heat-resistant polyimide films containing quinoxaline moiety for flexible substrate applications" @default.
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- W3081777038 doi "https://doi.org/10.1016/j.polymer.2020.122963" @default.
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