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Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids

[Image: see text] Semiaromatic polyamides were directly synthesized by bulk polycondensation of aliphatic dicarboxylic acids (with 5, 6, 7, and 10 carbon numbers) and aromatic diamines (4,4′-oxydianiline and 4,4′-diaminodiphenylmethane) under natural pressure. In addition, copolyamides were successf...

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Autores principales: Endo, Taiki, Higashihara, Tomoya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8928493/
https://www.ncbi.nlm.nih.gov/pubmed/35309482
http://dx.doi.org/10.1021/acsomega.1c06983
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author Endo, Taiki
Higashihara, Tomoya
author_facet Endo, Taiki
Higashihara, Tomoya
author_sort Endo, Taiki
collection PubMed
description [Image: see text] Semiaromatic polyamides were directly synthesized by bulk polycondensation of aliphatic dicarboxylic acids (with 5, 6, 7, and 10 carbon numbers) and aromatic diamines (4,4′-oxydianiline and 4,4′-diaminodiphenylmethane) under natural pressure. In addition, copolyamides were successfully obtained by the copolymerization of aliphatic dicarboxylic acids, aromatic diamines, and biobased amino acid, 4-aminohydrocinnamic acid. The obtained polyamides had relatively high inherent viscosity values of 0.35–0.76 dL/g. The obtained polyamides exhibited good thermal stability with T(d5%) in the range of 316–416 °C, even when incorporated with aliphatic methylene units. In particular, some copolyamides (2AO, 2PO, and 2GM) had high T(g) values of 150, 158, and 156 °C and relatively low T(m) values of 277, 288, and 234 °C, respectively, which may be preferable thermal properties for melt-drawing processes.
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spelling pubmed-89284932022-03-18 Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids Endo, Taiki Higashihara, Tomoya ACS Omega [Image: see text] Semiaromatic polyamides were directly synthesized by bulk polycondensation of aliphatic dicarboxylic acids (with 5, 6, 7, and 10 carbon numbers) and aromatic diamines (4,4′-oxydianiline and 4,4′-diaminodiphenylmethane) under natural pressure. In addition, copolyamides were successfully obtained by the copolymerization of aliphatic dicarboxylic acids, aromatic diamines, and biobased amino acid, 4-aminohydrocinnamic acid. The obtained polyamides had relatively high inherent viscosity values of 0.35–0.76 dL/g. The obtained polyamides exhibited good thermal stability with T(d5%) in the range of 316–416 °C, even when incorporated with aliphatic methylene units. In particular, some copolyamides (2AO, 2PO, and 2GM) had high T(g) values of 150, 158, and 156 °C and relatively low T(m) values of 277, 288, and 234 °C, respectively, which may be preferable thermal properties for melt-drawing processes. American Chemical Society 2022-03-03 /pmc/articles/PMC8928493/ /pubmed/35309482 http://dx.doi.org/10.1021/acsomega.1c06983 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Endo, Taiki
Higashihara, Tomoya
Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids
title Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids
title_full Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids
title_fullStr Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids
title_full_unstemmed Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids
title_short Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and Aliphatic Dicarboxylic Acids
title_sort direct synthesis of thermally stable semiaromatic polyamides by bulk polymerization using aromatic diamines and aliphatic dicarboxylic acids
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8928493/
https://www.ncbi.nlm.nih.gov/pubmed/35309482
http://dx.doi.org/10.1021/acsomega.1c06983
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