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JSIR Vol.69(03) [March 2010] >

Title: Study of hygrothermal ageing on properties of polyester / glass composites
Authors: Anand, Dhiraj
Bedi, Raman
Chandra, Rakesh
Tiwari, S K
Keywords: Hygrothermal degradation
Polyester / glass composites
Water absorption
Issue Date: Mar-2010
Publisher: CSIR
Abstract: This study presents hygrothermal degradation of unidirectional glass fiber reinforced polyester composites (GFRPC). Water absorption of GFRPC immersed in distilled water (DW) at RT and river water (RW) at different temperatures was studied. Water absorption of GFRPC immersed in distilled water increased with time and temperature except for samples immersed in river water at 60°C. Moisture absorption (%) in GFRPC increased with increase in fiber content. Degradation of properties [loss tangent (tan ), glass transition temperature (Tg) and storage modulus (E’ )] was determined after moisture saturation and drying of specimens using dynamic mechanical analyser (DMA). E’ and Tg decreased after moisture absorption for all specimens. Tg showed an almost complete recovery after drying in most cases, whereas E’ reduced permanently after hygrothermal conditioning.
Page(s): 204-207
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.69(03) [March 2010]

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