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New Insights in the...
New Insights in the Synthesis of High-Molecular-Weight Aromatic Polyamides-Improved Synthesis of Rod-like PPTA
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- Hernández, Guiomar (författare)
- Uppsala universitet,Strukturkemi,CSIC, Inst Ciencia & Tecnol Polimeros ICTP, E-28006 Madrid, Spain.
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- Ferrero, Sergio (författare)
- Univ Valladolid, IU CINQUIMA, E-47011 Valladolid, Spain.
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- Reinecke, Helmut (författare)
- CSIC, Inst Ciencia & Tecnol Polimeros ICTP, E-28006 Madrid, Spain.
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- Bartolome, Camino (författare)
- Univ Valladolid, IU CINQUIMA, E-47011 Valladolid, Spain.
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- Martinez-Ilarduya, Jesus M. (författare)
- Univ Valladolid, IU CINQUIMA, E-47011 Valladolid, Spain.
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- Alvarez, Cristina (författare)
- CSIC, Inst Ciencia & Tecnol Polimeros ICTP, E-28006 Madrid, Spain.;Univ Valladolid, IU CINQUIMA, E-47011 Valladolid, Spain.;Univ Valladolid, Fac Ciencias, Associated Res Unit CSIC, E-47011 Valladolid, Spain.
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- Lozano, Angel E. (författare)
- CSIC, Inst Ciencia & Tecnol Polimeros ICTP, E-28006 Madrid, Spain.;Univ Valladolid, IU CINQUIMA, E-47011 Valladolid, Spain.;Univ Valladolid, Fac Ciencias, Associated Res Unit CSIC, E-47011 Valladolid, Spain.
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(creator_code:org_t)
- 2023-02-01
- 2023
- Engelska.
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Ingår i: International Journal of Molecular Sciences. - : MDPI. - 1661-6596 .- 1422-0067. ; 24:3
- Relaterad länk:
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https://doi.org/10.3...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- polyamidation
- in situ silylation
- poly(p-phenylene terephthalamide) (PPTA)
- Kevlar
- NMR
- DFT molecular simulation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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