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New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA

By employing a variation of the polyamidation method using in situ silylated diamines and acid chlorides, it was possible to obtain a rod-type polyamide: poly(p-phenylene terephthalamide) (PPTA, a polymer used in the high-value-added material Kevlar), with a molecular weight much higher than that ob...

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Autores principales: Hernández, Guiomar, Ferrero, Sergio, Reinecke, Helmut, Bartolomé, Camino, Martinez-Ilarduya, Jesús M., Álvarez, Cristina, Lozano, Ángel E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9917457/
https://www.ncbi.nlm.nih.gov/pubmed/36769053
http://dx.doi.org/10.3390/ijms24032734
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author Hernández, Guiomar
Ferrero, Sergio
Reinecke, Helmut
Bartolomé, Camino
Martinez-Ilarduya, Jesús M.
Álvarez, Cristina
Lozano, Ángel E.
author_facet Hernández, Guiomar
Ferrero, Sergio
Reinecke, Helmut
Bartolomé, Camino
Martinez-Ilarduya, Jesús M.
Álvarez, Cristina
Lozano, Ángel E.
author_sort Hernández, Guiomar
collection PubMed
description By employing a variation of the polyamidation method using in situ silylated diamines and acid chlorides, it was possible to obtain a rod-type polyamide: poly(p-phenylene terephthalamide) (PPTA, a polymer used in the high-value-added material Kevlar), with a molecular weight much higher than that obtained with the classical and industrial polyamidation method. The optimization of the method has consisted of using, together with the silylating agent, a mixture of pyridine and a high-pKa tertiary amine. The research was complemented by a combination of nuclear magnetic resonance and molecular simulation studies, which determined that the improvements in molecular weight derive mainly from the formation of silylamide groups in the growing polymer.
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spelling pubmed-99174572023-02-11 New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA Hernández, Guiomar Ferrero, Sergio Reinecke, Helmut Bartolomé, Camino Martinez-Ilarduya, Jesús M. Álvarez, Cristina Lozano, Ángel E. Int J Mol Sci Article By employing a variation of the polyamidation method using in situ silylated diamines and acid chlorides, it was possible to obtain a rod-type polyamide: poly(p-phenylene terephthalamide) (PPTA, a polymer used in the high-value-added material Kevlar), with a molecular weight much higher than that obtained with the classical and industrial polyamidation method. The optimization of the method has consisted of using, together with the silylating agent, a mixture of pyridine and a high-pKa tertiary amine. The research was complemented by a combination of nuclear magnetic resonance and molecular simulation studies, which determined that the improvements in molecular weight derive mainly from the formation of silylamide groups in the growing polymer. MDPI 2023-02-01 /pmc/articles/PMC9917457/ /pubmed/36769053 http://dx.doi.org/10.3390/ijms24032734 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hernández, Guiomar
Ferrero, Sergio
Reinecke, Helmut
Bartolomé, Camino
Martinez-Ilarduya, Jesús M.
Álvarez, Cristina
Lozano, Ángel E.
New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
title New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
title_full New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
title_fullStr New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
title_full_unstemmed New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
title_short New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
title_sort new insights in the synthesis of high-molecular-weight aromatic polyamides-improved synthesis of rod-like ppta
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9917457/
https://www.ncbi.nlm.nih.gov/pubmed/36769053
http://dx.doi.org/10.3390/ijms24032734
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