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Título: | New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA |
Autor: | Hernández, Guiomar CSIC ORCID; Ferrero, Sergio; Reinecke, Helmut CSIC ORCID; Bartolomé, Camino; Martínez-Ilarduya, Jesús M.; Álvarez, Cristina CSIC ORCID; Lozano López, Ángel Emilio CSIC ORCID | Palabras clave: | polyamidation in situ silylation poly(p-phenylene terephthalamide) (PPTA) Kevlar NMR DFT molecular simulation |
Fecha de publicación: | 2023 | Editor: | Molecular Diversity Preservation International | Citación: | International Journal of Molecular Sciences 24: 3 (2023) | Resumen: | 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. | Versión del editor: | http://dx.doi.org/10.3390/ijms24032734 | URI: | http://hdl.handle.net/10261/307705 | DOI: | 10.3390/ijms24032734 | Identificadores: | doi: 10.3390/ijms24032734 issn: 1422-0067 |
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