Paper number 1214
|A COMPARATIVE STUDY OF MOISTURE ABSORPTION AND DESORPTION OF COMPOSITE MATERIALS|
Shi Yong, Su Yutang, He Feng and Zhang Lichen
FRP Research and Design Institute
P.O. Box 261 Beijing, P.R. China 102101
|Summary||In the present investigation, the moisture absorption and desorption of two type of composite materials have been studied. The two types of composites materials are T1: unidirectional glass fiber reinforced DGEBA type epoxy resin composite (filament winding unidirectional flat plate) and T2: chopped glass fiber reinforced hydroxymethylated nylon modified phenol resin composite (mould pressing plate). The absorption test was carried out in deionized water and in artificial seawater at room temperature. The desorption test was conducted in a dessicator also at room temperature. The water absorption and desorption curves were determined. The experiment indicated that on a time basis, T1's moisture absorption rate ans saturation moisture content in deionized water were significantly greater than in artificial seawater. In contrast to T1, T2's moisture absorption rate in artificial seawater was slightly higher than in deionized water. For both T1 and T2, the immersive media almost had no influence on after immersed desorption curves.
||Keywords|| moisture absorption, moisture desorption, swelling, artificial seawater, leaching.
Theme : Durability and Ageing
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