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Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers

In this paper, we proposed an approach to study the strain response of polymer film samples under various temperature effects and note their corresponding effects. The advantages of the developed approach are determined by the fact that thin films of material are used as samples where it is possible...

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Autores principales: Shardakov, Igor N., Trufanov, Aleksandr N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8471073/
https://www.ncbi.nlm.nih.gov/pubmed/34577938
http://dx.doi.org/10.3390/polym13183035
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author Shardakov, Igor N.
Trufanov, Aleksandr N.
author_facet Shardakov, Igor N.
Trufanov, Aleksandr N.
author_sort Shardakov, Igor N.
collection PubMed
description In this paper, we proposed an approach to study the strain response of polymer film samples under various temperature effects and note their corresponding effects. The advantages of the developed approach are determined by the fact that thin films of material are used as samples where it is possible to generate a sufficiently uniform temperature field in a wide range of temperature change rates. A dynamic mechanical analyzer was used for the experimental implementation of the above approach for two UV-curable polymers and one type of epoxy resin. Experimental results have shown that the thermal expansion coefficients for these polymers depend significantly not only on the temperature but also on its change rate. The strain response of the polymer to heating and cooling, with the same absolute values of the rate of temperature change, differs significantly, and this dissimilarity becomes stronger with its increasing. The results of thermomechanical experiments for massive samples on traditional dilatometer are shown to compare with the results for film samples. The discovered dependences of the temperature expansion coefficient on the temperature and its change rate can be used for mathematical modeling of thermomechanical processes arising during the operation of products made of polymers.
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spelling pubmed-84710732021-09-27 Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers Shardakov, Igor N. Trufanov, Aleksandr N. Polymers (Basel) Article In this paper, we proposed an approach to study the strain response of polymer film samples under various temperature effects and note their corresponding effects. The advantages of the developed approach are determined by the fact that thin films of material are used as samples where it is possible to generate a sufficiently uniform temperature field in a wide range of temperature change rates. A dynamic mechanical analyzer was used for the experimental implementation of the above approach for two UV-curable polymers and one type of epoxy resin. Experimental results have shown that the thermal expansion coefficients for these polymers depend significantly not only on the temperature but also on its change rate. The strain response of the polymer to heating and cooling, with the same absolute values of the rate of temperature change, differs significantly, and this dissimilarity becomes stronger with its increasing. The results of thermomechanical experiments for massive samples on traditional dilatometer are shown to compare with the results for film samples. The discovered dependences of the temperature expansion coefficient on the temperature and its change rate can be used for mathematical modeling of thermomechanical processes arising during the operation of products made of polymers. MDPI 2021-09-08 /pmc/articles/PMC8471073/ /pubmed/34577938 http://dx.doi.org/10.3390/polym13183035 Text en © 2021 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
Shardakov, Igor N.
Trufanov, Aleksandr N.
Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers
title Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers
title_full Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers
title_fullStr Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers
title_full_unstemmed Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers
title_short Identification of the Temperature Dependence of the Thermal Expansion Coefficient of Polymers
title_sort identification of the temperature dependence of the thermal expansion coefficient of polymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8471073/
https://www.ncbi.nlm.nih.gov/pubmed/34577938
http://dx.doi.org/10.3390/polym13183035
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