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Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes

Polymeric membranes are glassy materials at non-equilibrium state and inherently undergo a spontaneous evolution towards equilibrium known as physical aging. Volume relaxation characteristic during the course of aging is governed by the surrounding temperature in which the polymeric material is aged...

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Autores principales: Lock, S. S. M., Lau, K. K., Shariff, A. M., Yeong, Y. F., Ahmad, Faizan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9085435/
https://www.ncbi.nlm.nih.gov/pubmed/35546824
http://dx.doi.org/10.1039/c8ra05323e
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author Lock, S. S. M.
Lau, K. K.
Shariff, A. M.
Yeong, Y. F.
Ahmad, Faizan
author_facet Lock, S. S. M.
Lau, K. K.
Shariff, A. M.
Yeong, Y. F.
Ahmad, Faizan
author_sort Lock, S. S. M.
collection PubMed
description Polymeric membranes are glassy materials at non-equilibrium state and inherently undergo a spontaneous evolution towards equilibrium known as physical aging. Volume relaxation characteristic during the course of aging is governed by the surrounding temperature in which the polymeric material is aged. Although there are studies to understand how polymeric materials evolve over time towards equilibrium at different operating temperatures, the theories have been developed merely in response to experimental observations and phenomenological theory at bulk glassy state without the implementation of sample size effects. Limited work has been done to characterize the physical aging process to thin polymeric films using reasonable physical parameters and mathematical models with incorporation of thermodynamics and film thickness consideration. The current work applies the Tait equation of states and thickness dependent glass transition temperature, integrated within a simple linear correlation, to model the temperature and thickness dependent physical aging. The mathematical model has been validated with experimental aging data, whereby a small deviation is observed that has been explained by intuitive reasoning pertaining to the thermodynamic parameters. The mathematical model has been further employed to study the gas transport properties of O(2) and N(2), which is anticipated to be applied in oxygen enriched combustion for generation of cleaner and higher efficiency fuel in future work.
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spelling pubmed-90854352022-05-10 Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes Lock, S. S. M. Lau, K. K. Shariff, A. M. Yeong, Y. F. Ahmad, Faizan RSC Adv Chemistry Polymeric membranes are glassy materials at non-equilibrium state and inherently undergo a spontaneous evolution towards equilibrium known as physical aging. Volume relaxation characteristic during the course of aging is governed by the surrounding temperature in which the polymeric material is aged. Although there are studies to understand how polymeric materials evolve over time towards equilibrium at different operating temperatures, the theories have been developed merely in response to experimental observations and phenomenological theory at bulk glassy state without the implementation of sample size effects. Limited work has been done to characterize the physical aging process to thin polymeric films using reasonable physical parameters and mathematical models with incorporation of thermodynamics and film thickness consideration. The current work applies the Tait equation of states and thickness dependent glass transition temperature, integrated within a simple linear correlation, to model the temperature and thickness dependent physical aging. The mathematical model has been validated with experimental aging data, whereby a small deviation is observed that has been explained by intuitive reasoning pertaining to the thermodynamic parameters. The mathematical model has been further employed to study the gas transport properties of O(2) and N(2), which is anticipated to be applied in oxygen enriched combustion for generation of cleaner and higher efficiency fuel in future work. The Royal Society of Chemistry 2018-08-28 /pmc/articles/PMC9085435/ /pubmed/35546824 http://dx.doi.org/10.1039/c8ra05323e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Lock, S. S. M.
Lau, K. K.
Shariff, A. M.
Yeong, Y. F.
Ahmad, Faizan
Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes
title Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes
title_full Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes
title_fullStr Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes
title_full_unstemmed Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes
title_short Mathematical modelling of thickness and temperature dependent physical aging to O(2)/N(2) gas separation in polymeric membranes
title_sort mathematical modelling of thickness and temperature dependent physical aging to o(2)/n(2) gas separation in polymeric membranes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9085435/
https://www.ncbi.nlm.nih.gov/pubmed/35546824
http://dx.doi.org/10.1039/c8ra05323e
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