Abstract
New aromatic polyimides conatining tetraphenylthiophene unit were synthesized from 3,4-bis(4-aminophenyl)-2,5-diphenylthiophene and various aromatic tetracarboxylic dianhydrides by the conventional two-step procedure that included ring-opening polyaddition in a polar amide-type solvent and subsequent thermal cyclodehydration. These polyimides had inherent viscosities of 0.18—0.35 dlg−1 and were readily soluble in a wide range of organic solvents such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, m-cresol, and pyridine. The glass transition temperatures of the polyimides were in the range of 269—327°C, and the 10% weight loss temperatures were 550—660°C in nitrogen.
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Jeong, HJ., Kobayashi, A., Kakimoto, Ma. et al. Synthesis and Characterization of Novel Aromatic Polyimides from 3,4-Bis(4-aminophenyl)-2,5-diphenylthiophene and Aromatic Tetracarboxylic Dianhydrides. Polym J 26, 373–377 (1994). https://doi.org/10.1295/polymj.26.373
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DOI: https://doi.org/10.1295/polymj.26.373
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