Effect of Blending Butylacrylate with Unsaturated Polyester Resin on Toughness of Matrix and Mechanical Properties of Kenaf and Glass Fiber- based Composites

Document Type : Research Paper

Authors

1 Department of Wood and Paper Science and technology

2 استادیار دانشگاه تهران

3 Amirkabir University of Technology

4 university of tehran

Abstract

In this study, the effect of blending butyl acrylate with orthophthalic unsaturated polyester resin were investigated on toughness of the matrix and some mechanical properties of the composites with the same matrix. In the first phase, the blends, as matrix, have been fabricated by two different curing systems (cold cure with methyl ethyl ketone peroxide as catalyst, and hot cure with di-benzoyl peroxide as catalyst), each by combinations of 0, 5, 10, 15, 20 and 25 % monomeric butyl acrylate. Izod impact test was used to evaluate the toughness of blended matrix and pure matrix. In the second phase, kenaf and glass fiber-based composites were made by the blended matrix with the highest impact strength, then subjected to some mechanical tests such as toughness, failure energy, ultimate strength, modulus of elasticity, and heat deflection temperature. Test results showed that the highest value for impact strength, as 1.91 kJ m-2 was attained for cold curing system with 15% monomeric butyl acrylate. Impact strength or toughness of blended matrix/fiber composites was around 31% more than that of for pure polyester/fiber composites. In addition, modulus of elasticity of blended matrix reinforced by fibers was around 133% less than that of for pure polyester/fiber composites. Finally, the results showed that monomeric butyl acrylate had a negative effect on ultimate strength and heat deflection temperature of blended matrix/kenaf and glass fiber-based composites

Keywords

References

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Iranian Journal of Wood and Paper Industries
Volume 11, Issue 4
March 2021
Pages 669-682

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