The hybrid composites of unsaturated polyester based sisal/glass fibre hybrid composites were prepared. Glass/sisal fibers were combined in the same matrix (unsaturated polyester) to make hybrid composites and the tensile and flexural properties are studied. A significant improvement in tensile and flexural properties of sisal/glass fibre hybrid composites was found. The chalk powder (additive) is also added to the resin (unsaturated polyester) in proportions of 1%,2%,3% by weight of resin respectively and sisal/glass fibre hybrid composites were prepared by using this resin to study the effect of chalk powder on tensile and flexural properties of these hybrid composites. It is also observed that as the chalk powder quantity increases tensile and flexural properties are decreases.
© 2011 Universal Research Publications. All rights reserved Keywords: Hybrid composite, unsaturated polyester, sisal fibre, glass fibre, tensile strength, flexural strength