Cargando…

Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers

Despite the polymer industry's reliance on nylon polymers, numerous questions remain about their crystal structures, modeling, and other features. This work discusses the thermodynamic properties and molecular modeling of a polyamides nylon 66α, 610α, and 77γ crystal structure systems for use i...

Descripción completa

Detalles Bibliográficos
Autor principal: Al-Shawabkeh, Ali F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10616352/
https://www.ncbi.nlm.nih.gov/pubmed/37916125
http://dx.doi.org/10.1016/j.heliyon.2023.e21042
_version_ 1785129376821542912
author Al-Shawabkeh, Ali F.
author_facet Al-Shawabkeh, Ali F.
author_sort Al-Shawabkeh, Ali F.
collection PubMed
description Despite the polymer industry's reliance on nylon polymers, numerous questions remain about their crystal structures, modeling, and other features. This work discusses the thermodynamic properties and molecular modeling of a polyamides nylon 66α, 610α, and 77γ crystal structure systems for use in various electronics and Nano-devices that feature distinct properties such as exceptional optoelectronic properties at a low cost compared to other structures. This study looked at the crystal structure of a linear polyamide chain made up of repeating units. The influence of the thermal expansion coefficient and thermodynamic parameters on crystal structures' characteristics at different temperatures has previously been explored. The findings of this study demonstrate, on the one hand, the influence of the amorphous phase on the final thermodynamic characteristics of semi-crystalline polymers and, on the other hand, pave the way for greater improvement in the durability of these polymers by increasing their crystalline features. The values of the thermodynamic parameters for nylon 66α, 610α and 77γ such as enthalpy (ΔH(Exp).) were 35.08, 40.25, and 1.44 kJ/mol, entropy (ΔS(Exp.)) 113.75, 128.84, and 15.10 J/mol-K, free energy (ΔG(Exp.)) was −44.57, −46.62, and −6.86 kJ/mol, respectively. When the nylon data is compared, the nylon 610α exhibits a significantly higher free energy, at high temperatures, the process is spontaneous and exergonic, making it a potentially viable material for use as fibers and engineering thermoplastics.
format Online
Article
Text
id pubmed-10616352
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Elsevier
record_format MEDLINE/PubMed
spelling pubmed-106163522023-11-01 Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers Al-Shawabkeh, Ali F. Heliyon Research Article Despite the polymer industry's reliance on nylon polymers, numerous questions remain about their crystal structures, modeling, and other features. This work discusses the thermodynamic properties and molecular modeling of a polyamides nylon 66α, 610α, and 77γ crystal structure systems for use in various electronics and Nano-devices that feature distinct properties such as exceptional optoelectronic properties at a low cost compared to other structures. This study looked at the crystal structure of a linear polyamide chain made up of repeating units. The influence of the thermal expansion coefficient and thermodynamic parameters on crystal structures' characteristics at different temperatures has previously been explored. The findings of this study demonstrate, on the one hand, the influence of the amorphous phase on the final thermodynamic characteristics of semi-crystalline polymers and, on the other hand, pave the way for greater improvement in the durability of these polymers by increasing their crystalline features. The values of the thermodynamic parameters for nylon 66α, 610α and 77γ such as enthalpy (ΔH(Exp).) were 35.08, 40.25, and 1.44 kJ/mol, entropy (ΔS(Exp.)) 113.75, 128.84, and 15.10 J/mol-K, free energy (ΔG(Exp.)) was −44.57, −46.62, and −6.86 kJ/mol, respectively. When the nylon data is compared, the nylon 610α exhibits a significantly higher free energy, at high temperatures, the process is spontaneous and exergonic, making it a potentially viable material for use as fibers and engineering thermoplastics. Elsevier 2023-10-16 /pmc/articles/PMC10616352/ /pubmed/37916125 http://dx.doi.org/10.1016/j.heliyon.2023.e21042 Text en © 2023 The Author. Published by Elsevier Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Research Article
Al-Shawabkeh, Ali F.
Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers
title Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers
title_full Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers
title_fullStr Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers
title_full_unstemmed Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers
title_short Thermodynamic characteristics of the aliphatic polyamide crystal structures: Enhancement of nylon 66α, 610α and 77γ polymers
title_sort thermodynamic characteristics of the aliphatic polyamide crystal structures: enhancement of nylon 66α, 610α and 77γ polymers
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10616352/
https://www.ncbi.nlm.nih.gov/pubmed/37916125
http://dx.doi.org/10.1016/j.heliyon.2023.e21042
work_keys_str_mv AT alshawabkehalif thermodynamiccharacteristicsofthealiphaticpolyamidecrystalstructuresenhancementofnylon66a610aand77gpolymers