Abstract
Sandwich panels are composites that consist of two, thin laminate outer skins and a lightweight thick core structure. In this paper, the glass fiber-reinforced polymer (GFRP) composite skins based on epoxy resin and unsaturated polyester resin have been fabricated with glass fiber reinforcement using the vacuum bagging method. This work investigated the mechanical properties of the GFRP composite. The results reveal unusual behavior that the unsaturated polyester resin-based composite skin has a higher tensile and flexural strength of 240.09 MPa and 264.59 MPa respectively than those of the epoxy resin-based. Meanwhile, the thermal properties of the TGA test results show the thermal stability of the two types of composite skin. It was found that GFRP unsaturated polyester has better mechanical properties than GFRP epoxy due to better fiber-resin bonding.
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