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Flexural and Shear Properties of Silica Particle Modified Glass Fiber Reinforced Epoxy Composite

Department of Mechanical and Materials Engineering, Queen’s University, Kingston, Ontario, Canada K7L 3N6, cao{at}post.queensu.ca

J. Cameron

Department of Mechanical and Materials Engineering, Queen’s University, Kingston, Ontario, Canada K7L 3N6

The objective of this study is to develop a new method of manufacturing glass fiber reinforced epoxy composites and to quantitatively show that the properties of such a new material are superior to that of a conventional fiber reinforced polymer composite of the same material base composition. To achieve this objective, the glass fiber (GF) reinforced epoxy composite samples are prepared in four different ways: Method A, using ‘clean’ GF as the reinforcement (i.e., with no modification or additional treatment to the as-received fiber); Method B, modifying the surface of the GF with silica particles before applying in the composite system; Method C, prestressing the clean GF during the curing procedure of the composite; and Method D, prestressing the silica modified GF during the curing procedure of the composite. Preparation by Method D is the newly developed method. The finished composite samples are tested by the three-point bend test and the short-beam shear test under ASTM standard conditions. The results indicate that the composites prepared by the new method, which include the GF surface modification and the GF prestressing preparation conditions, have an excellent combination of properties when compared to the specimens made by the other three methods.

Key Words: silica particle • glass fiber • epoxy • modification • composite • flexural strength • flexural modulus • shear modulus

This version was published on March 1, 2006

Journal of Reinforced Plastics and Composites, Vol. 25, No. 4, 347-359 (2006)
DOI: 10.1177/0731684405056450


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