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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2023
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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. |
format | Online Article Text |
id | pubmed-9917457 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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