Improvement of tensile properties and toughness of an epoxy resin by nanozirconium-dioxide reinforcement |
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Authors: | Rosa Medina Frank Haupert Alois K Schlarb |
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Affiliation: | 1. Institut für Verbundwerkstoffe GmbH, University of Kaiserslautern, Erwin Schr?dinger Str. 58, Kaiserslautern, 67663, Germany
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Abstract: | Zirconium dioxide (ZrO2) nanoparticles were systematically added as reinforcement to a diglycidyl ether of bisphenol A (DGEBA)-based epoxy resin.
A series of composites with varying amounts of nanoparticles was prepared and their morphology and mechanical properties were
studied. The obtained nanocomposites were characterized by tensile tests, dynamic mechanical thermal analysis, and fracture
toughness (KIC) investigations; by standardized methods, to define the influence of the nanoparticle content on their mechanical and thermal
properties. The morphological analysis of the composites shows that nanoparticles form small clusters, which are uniformly
distributed into the matrix bulk. The tensile modulus (E) and the KIC of the epoxy matrix increase at rising zirconia content. Improvements of more than 37% on modulus and 100% on KIC were reached by the nanocomposite containing 10 vol.-% ZrO2 with respect to the neat epoxy (Eo = 3.1 GPa, KICo = 0.74 MPam0.5). The presence of nanoparticles produces also an increment on glass transition temperature (T
g). The epoxy resin added with 8 vol.-% ZrO2 records a T
g approximately 8% higher than the unmodified matrix (T
go = 100.3 °C). |
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