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Here, we report superheat-resistant polymers, poly(benzoxazole imide)s (PBOI), with very low coefficients of thermal expansion (CTE) and sufficient ductility for applications as the plastic substrates of organic light-emitting diode (OLED) displays. Diamines incorporating benzoxazole (BO) units were synthesized for this purpose. A PBOI derived from a BO-containing diamine and 3,3′,4,4′-biphenyltetracarboxylic...
Alkyl‐substituted cyclobutanetetracarboxylic dianhydrides (CBDAs) were synthesized by photo‐dimerization of alkyl‐substituted maleic anhydrides to obtain novel colorless polyimides (PIs). Dimethyl‐substituted CBDA (DM‐CBDA) showed much higher polymerizability with various diamines than conventional cycloaliphatic tetracarboxylic dianhydrides and led to high molecular weights of PI precursors. Polyaddition...
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