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The viscoelastic properties of surface layers of a Primer-204 epoxy resin modified by silicon dioxide nanoparticles with weight fractions of 0.24, 0.41, 0.65, and 2% were investigated. Material specimens were indented using a Hysitron TI 950 Triboindenter nanomechanical test system. The load and the loading and holding times had a significant effect on the values of hardness and reduced the elastic...
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