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Evolution of viscoelastic behavior of a curingLY5052 epoxy resin in the glassy state
Department of Mechanics and Processes, Swerea SICOMP.
Department of Structural Analysis and Modeling, Swerea SICOMP.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Number of Authors: 3
2016 (English)In: Advanced Manufacturing: Polymer & Composites Science, ISSN 2055-0340 (Print) 2055-0359 (Online), Vol. 2, no 2, 74-82 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this work is to develop amethodology to analyze the influence of the curinghistory on the viscoelastic storage modulus. Twodifferent experimental approaches are presentedexposing the material to various cure temperatureand cure time sequences. The evolving viscoelasticproperties are characterized using standard DynamicMechanical and Thermal Analysis (DMTA) equipment.Therefore, the present study is limited to infinitesimally small strains and linear viscoelasticity only. The methodologyis demonstrated using the LY5052 epoxy resin system for its storage modulus E′ in the frequency domain. Resultsindicate that evolution of thermo-viscoelastic properties could be indeed assumed independent of the cure history for theinvestigated LY5052. We observe that the shift factor in the reduced time expression for the viscoelastic model examinedin this paper is a product of two shift functions, namely the temperature and cure shift functions.

Place, publisher, year, edition, pages
2016. Vol. 2, no 2, 74-82 p.
Keyword [en]
Thermosetting resin, curing, mechanical properties, thermal analysis
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-59683DOI: 10.1080/20550340.2016.1236223OAI: oai:DiVA.org:ltu-59683DiVA: diva2:1034503
Funder
VINNOVA, 2014-06041Swedish Research Council, 621-2008-5943
Available from: 2016-10-12 Created: 2016-10-12 Last updated: 2016-11-30Bibliographically approved

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Publisher's full texthttp://dx.doi.org/10.1080/20550340.2016.1236223

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