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Moisture Absorption Phenomenon in Permeable Fiber Polymer Composites

Rao, RMVGK and Balasubramanian, N (1981) Moisture Absorption Phenomenon in Permeable Fiber Polymer Composites. In: Journal of Applied Polymer Science, 26 . pp. 4069-4079.

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Abstract

Studies were conducted on the moisture absorption characteristics of jute fiber composites based on polyester and epoxy resin systems, under constant humidity (\phi) and ambient temperature (T) conditions. The initial slope of the moisture absorption curve (a direct measure of the composite diffusivity) increased with increased superficial fiber volume fraction ( $V_f$ ), where as the time ($T_m$'), needed to reach the equilibrium moisture absorption value showed a reversed trend. This behavior is just a reverse to that observed in case of composites with practically impermeable fibers (e.g., glass and graphite) in the same resin matrices. The theoretical expressions governing moisture diffusion phenomenon in impermeable fiber composites were modified and analyzed for the case of composites containing a permeable fiber. The experimental data obtained on the latter were then discussed in relation to the modified theory. The meaning of a correct fiber volume fraction ($V_f$') as applicable to permeable fiber composites was defined.

Item Type: Journal Article
Additional Information: The copyright belongs to John Wiley and Sons, Inc.
Keywords: polymer composites;polyester;epoxy resin;fiber composites;moisture absorption
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Depositing User: Sandhya Jagirdar
Date Deposited: 01 Sep 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ac.in/id/eprint/3586

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