Hot-Wet Property Characterisation of a High-Temperature Cured Glass–Epoxy Composite in Immersion Environment

Revathi, A and Prakash, M.Rajendra and Singh, AK and Mahale, Santhosh and Srihari, Shylaja and Rao, RMVGK (2004) Hot-Wet Property Characterisation of a High-Temperature Cured Glass–Epoxy Composite in Immersion Environment. Journal of Reinforced Plastics and Composites, 23 (17). pp. 1884-1892. ISSN 0731-6844

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Abstract

The hygrothermal diffusion and degradation behavior of a high-temperature cured glass–epoxy (Epoxy Novolac – EPN) composite system was studied under two environmental conditions (i.e. 323K and 343K immersion in distilled water). Samples immersed at 343K showed higher diffusivity (Dc) value and lower saturation time (tm) than those of 323K immersion while the maximum moisture content (Mm) remained the same, good Fickian correlation were observed for the composite system. As regards the degradative effects, the glass transition temperature (Tg) of the composite decreased with increased moisture content showing a maximum drop of 30C at full saturation, while the mechanical properties (ILSS and IPS) of saturated specimens degraded upto 26 and 33% respectively. Further these mechanical properties obtained at 70C/85%RH test condition showed good correlations with those predicted by a theoretical equation (Chamis et al. An Intergrated Theory for Predicting the Hydrothermo Mechanical Response of Advanced Composite Structural Components, Lewis Research Center, Cleveland, Ohio, NASA Technical Memorandum 73812).

Item Type: Article
Uncontrolled Keywords: glass–epoxy composite, resin transfer moulding (RTM), diffusivity, maximum moisture content, hot-wet property, inter-laminar shear strength (ILSS), in-plane shear (IPS), glass transition temperature (Tg).
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Ms Indrani V
Date Deposited: 21 Jul 2011 05:34
Last Modified: 21 Jul 2011 05:34
URI: http://nal-ir.nal.res.in/id/eprint/9459

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