Evolution of viscoelastic behavior of a curingLY5052 epoxy resin in the glassy state
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
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.
Thermosetting resin, curing, mechanical properties, thermal analysis
Composite Science and Engineering
Research subject Polymeric Composite Materials
IdentifiersURN: urn:nbn:se:ltu:diva-59683DOI: 10.1080/20550340.2016.1236223OAI: oai:DiVA.org:ltu-59683DiVA: diva2:1034503
FunderVINNOVA, 2014-06041Swedish Research Council, 621-2008-5943