Hot-wet property characterisation of a high-temperature cured glass-epoxy composite in immersion environment

Mahale, Santhosh and Rajamani, Deepika and Revathi, A and Prakash, M.Rajendra 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. 1883-1892. 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. 323amp;deg;K and 343amp;deg;K immersion in distilled water). Samples immersed at 343amp;deg;K showed higher diffusivity (Dlt;subgt;clt;/subgt;) value and lower saturation time (tlt;subgt;mlt;/subgt;) than those of 323amp;deg;K immersion while the maximum moisture content (Mlt;subgt;mlt;/subgt;) remained the same, good Fickian correlation were observed for the composite system. As regards the degradative effects, the glass transition temperature (Tlt;subgt;glt;/subgt;) of the composite decreased with increased moisture content showing a maximum drop of 30amp;deg;C 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 70amp;deg;C/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: Journal Article
Uncontrolled Keywords: Composite materials;Epoxy resins;Curing;Glass transition;Shear strength;Diffusion;Degradation;Resin transfer molding
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Division/Department: Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 28 Mar 2007
Last Modified: 24 May 2010 09:55
URI: http://nal-ir.nal.res.in/id/eprint/4128

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