Characterization of nanosilica filled bis f epoxide with diamino diphenyl sulfone curing agents

A. Vashisth, C. E. Bakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The incorporation of nano-sized particles into epoxy has received increasing attention in recent years as a means of improving the mechanical performance of continuous fiber reinforced epoxy composites. Developments in surface chemistry have allowed high concentrations of spherical nanosilica particles to be uniformly dispersed in epoxide without agglomeration, filtration, or excessive increase in mix viscosity. Until the present time, however, only limited mechanical performance data have been published on such highly dispersable nanosilica in high temperature epoxies, especially in resin systems with high glass transition temperatures. In the current research, surface modified nanosilica in concentrations of up to 34.4% by weight in a diglycidyl ether of bisphenol F epoxide with 3,3' or 4-4' diamino diphenyl sulfone curing agents was investigated to determine the resulting mechanical properties. It was observed that Mode I fracture toughness and modulus improved significantly on addition of nanosilica without significantly affecting the glass transition temperature. Although the density of the resin system increased with increasing nanosilica concentration, specific modulus and specific fracture toughness also improved. Based on the experimental results, micromechanical models were used to back-calculate plausible elastic moduli of assumed interphase regions between the NS particles and the epoxy.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 31st Technical Conference, ASC 2016
EditorsBarry D. Davidson, Michael W. Czabaj, James G. Ratcliffe
PublisherDEStech Publications Inc.
ISBN (Electronic)9781605953168
StatePublished - Jan 1 2016
Event31st Annual Technical Conference of the American Society for Composites, ASC 2016 - Williamsburg, United States
Duration: Sep 19 2016Sep 21 2016

Publication series

NameProceedings of the American Society for Composites - 31st Technical Conference, ASC 2016

Other

Other31st Annual Technical Conference of the American Society for Composites, ASC 2016
CountryUnited States
CityWilliamsburg
Period9/19/169/21/16

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

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