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DMA Testing of Epoxy Resins: The Importance of Dimensions
Journal article   Peer reviewed

DMA Testing of Epoxy Resins: The Importance of Dimensions

Ian M. McAninch, Giuseppe R. Palmese, Joseph L. Lenhart and John J. La Scala
Polymer engineering and science, v 55(12), pp 2761-2774
01 Dec 2015

Abstract

Engineering Engineering, Chemical Physical Sciences Polymer Science Science & Technology Technology
Dynamic mechanical analysis is commonly used to characterize thermoset polymers at temperatures ranging from well below to well above their glass transition temperatures. Many sample fixtures are available; however, the best clamp and best sample dimensions for a given material are not often readily apparent. Five different epoxy amine networks with glass transitions spanning over 100 degrees C were characterized on three-point bending, dual cantilever, and single cantilever clamps with both constant thickness and constant span-to-thickness. Glassy modulus values were accurately measured on all clamps provided span-to-thickness ratios >10 were maintained. Thermal expansion and decreasing sample stiffness with increasing temperature greatly affect measurements in the rubbery region resulting in single cantilever clamps being best suited to measure rubbery data. (C) 2015 Society of Plastics Engineers

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Chemical
Polymer Science
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