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Physical aging effect on viscoelastic behavior of polymers
Luleå University of Technology, Sweden; Federal University of Rio Grande do Sul, Brazil Riga Technical University, Latvia.
Luleå University of Technology, Sweden.
Luleå University of Technology, Sweden.
Luleå University of Technology, Sweden.
Vise andre og tillknytning
2022 (engelsk)Inngår i: Composites Part C: Open Access, ISSN 2666-6820, Vol. 7, artikkel-id 100223Artikkel, forskningsoversikt (Fagfellevurdert) Published
Abstract [en]

The effect of physical aging on the viscoelastic (VE) behavior of epoxy resin is investigated experimentally performing strain-controlled tests at various temperatures on specimens aged at different temperatures (TA) for different times (tA). The aging effect is analyzed using as a framework Schapery's type of thermo-aging-rheologically simple (T-A-R simple) VE model that contains aging-state and test-temperature dependent shift factor. Experiments show that in first approximation, the shift factor can be presented as the product of aging related shift factor aA and temperature related factor aT. It is found that for short aging times the change rate of the aging shift factor with tA does not depend on TA, whereas for long tA at high TA the rate increases. Shift factors alone are not able to explain differences in relaxation curves for almost “fully” aged specimens aged at different high TA, It is shown that a T-A-R complex VE model with two additional aging-dependent functions can describe the observed discrepancies. © 2021

sted, utgiver, år, opplag, sider
Elsevier B.V. , 2022. Vol. 7, artikkel-id 100223
Emneord [en]
Numerical analysis, Physical aging, Shift factors, Viscoelasticity
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-57913DOI: 10.1016/j.jcomc.2021.100223Scopus ID: 2-s2.0-85121922581OAI: oai:DiVA.org:ri-57913DiVA, id: diva2:1626902
Merknad

Funding details: Swedish Foundation for International Cooperation in Research and Higher Education, STINT; Funding details: Kempestiftelserna, SMK-1738; Funding details: European Regional Development Fund, ERDF, 1.1.1.2/VIAA/4/20/641; Funding text 1: The authors would like to thank Higher Education Improvement Coordination (CAPES/Brazil), The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), Kempestiftelserna with funding referens SMK-1738 and ERDF within the Activity 1.1.1.2 “Post-doctoral Research Aid” of the Specific Aid Objective of the Operational Programme “Growth and Employment” (project No. 1.1.1.2/VIAA/4/20/641) for their financial support.

Tilgjengelig fra: 2022-01-12 Laget: 2022-01-12 Sist oppdatert: 2022-01-12bibliografisk kontrollert

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