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Molecular Design of Soluble Biopolyimide with High Rigidity

by 1 and 1,2,*
1
Graduate School of Advanced Science and Technology, Energy and Environment Area, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
2
Japan Science and Technology, ALCA, Tokyo 102-0076, Japan
*
Author to whom correspondence should be addressed.
Polymers 2018, 10(4), 368; https://doi.org/10.3390/polym10040368
Received: 28 February 2018 / Revised: 18 March 2018 / Accepted: 24 March 2018 / Published: 26 March 2018
(This article belongs to the Special Issue Aromatic Polymers)
New soluble biopolyimides were prepared from a diamine derived from an exotic amino acid (4-aminocinnamic acid) with several kinds of tetracarboxylic dianhydride. The biopolyimide molecular structural flexibility was tailored by modifying the tetracarboxylic dianhydride moiety. The obtained polyimides were soluble in various solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide, and even tetrahydrofuran. It was observed that the biopolyimide solubility was greatly dependent upon the structural flexibility (torsion energy). Flexible structure facilitated greater solubility. The synthesized biopolyimides were largely amorphous and had number-average molecular weight (Mn) in the range (5–8) × 105. The glass transition temperatures (Tg) of the polymers ranged from 259–294 °C. These polymers exhibited good thermal stability without significant weight loss up to 410 °C. The temperatures at 10% weight loss (Td10) for synthesized biopolyimide ranged from 375–397 °C. View Full-Text
Keywords: biopolyimide; soluble polymers; torsion energy; solubility trend biopolyimide; soluble polymers; torsion energy; solubility trend
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MDPI and ACS Style

Dwivedi, S.; Kaneko, T. Molecular Design of Soluble Biopolyimide with High Rigidity. Polymers 2018, 10, 368. https://doi.org/10.3390/polym10040368

AMA Style

Dwivedi S, Kaneko T. Molecular Design of Soluble Biopolyimide with High Rigidity. Polymers. 2018; 10(4):368. https://doi.org/10.3390/polym10040368

Chicago/Turabian Style

Dwivedi, Sumant; Kaneko, Tatsuo. 2018. "Molecular Design of Soluble Biopolyimide with High Rigidity" Polymers 10, no. 4: 368. https://doi.org/10.3390/polym10040368

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