EFFECT OF WATER ABSORPTION ON TENSILE PROPERTIES OF KENAF FIBER UNSATURATED POLYESTER COMPOSITES
Keywords:
Kenaf-unsaturated polyester composite, water absorption, mechanical properties, zero- stress agingAbstract
Physical and mechanical properties of kenaf fiber; namely, length, diameter, density, water absorption, tensile strength and Young’ modulus were observed experimentally. The percentage ratio of holocellulose content, and of bast and core kenaf fiber was investigated. The water absorption characteristic had an effect on the tensile properties of Kenaf fiber composites, and the results showed that moisture uptake increased as fiber weight percentage increased in composite. The experimental data was cross-matched against composite models, such as Hirsch, Einstein-Guth, modified Bowyer-Bader, Kelly-Tyson, Parallel, modified Guth, Cox-Krenchel, and Halpin-Tsai. The results show a good correlation with Hirsch’s model while the results obtained from Cox-Krenchel underestimated the experimental data.
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