Effect of Al(OH)3 Particle Fraction on Mechanical Properties of Particle-Reinforced Composites Using Unsaturated Polyester as Matrix
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The effect of particle fraction on mechanical properties of particle-reinforced composites was studied using tensile and hardness testing. Unsaturated polyester (UP) was used as polymer matrix, and aluminum hydroxide as the reinforcing particles. The fracture morphology of tensile samples was observed by scanning electron microscopy (SEM). The results showed that the tensile strength and absorbed energy increased to a maximum at 10% particle content and then decreased. With increasing content of aluminum hydroxide, the elastic modulus increased, and the fracture elongation decreased. The SEM showed that the failure of the Al(OH)3/UP composites was one of macroscopically brittle fracture. In addition, the study showed that appropriate amount of filler can enhance the surface hardness of Al(OH)3/UP composite.
KeywordsParticle-reinforced composites Mechanical properties Hardness testing Scanning electron microscopy (SEM)
This study was financially supported by National Natural Science Foundation of China (No. 50499333) and National R&D Infrastructure and Facility Development Program of China (No. 2005DKA10400).