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Abstract:
In this study, four novel aromatic polyimides (PIs) with twisted backbone and bulky side substituents were prepared via chemical imidization reaction and two-step condensation polymerization at reduced reaction temperature. The number-average and weight-average molecular weights of the resulting PIs are in the range of 1.98 × 104–4.10 × 104 and 2.66 × 104–5.32 × 104 g mol−1, respectively, while maintaining polydispersity indices consistently below 2.0. In addition, the obtained PIs showed excellent solubility in most common solvents, even in low-boiling solvents, such as chloroform, dichloromethane, and tetrahydrofuran. The films casted from these PIs also displayed optical transparency with a cutoff wavelength in the range of 335–360 nm. Among the PIs, PAPOT-OPDA, derived from 3,3′-Diisopropyl-4,4′-diaminodiphenyl-3″-phenoxybenzylmethane (PAPOT) and 3,3′,4,4′-diphenylethertetracarboxylic dianhydride (OPDA), exhibited the highest transparency of T450 = 81% and T500 = 85%, and the best solubility without compromising its thermal properties. © 2023 Wiley Periodicals LLC.
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Journal of Polymer Science
ISSN: 2642-4150
Year: 2024
Issue: 6
Volume: 62
Page: 1061-1073
3 . 9 0 0
JCR@2023
CAS Journal Grade:3
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ESI Highly Cited Papers on the List: 0 Unfold All
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