Flexural Properties of Polymethylmethacrylate Reinforced with Various Surface Treatments of Industrial Short-rod Glass Fiber
Objectives: To compare the flexural properties of polymethylmethacrylate reinforced with various surface treatments of industrial short-rod glass fiber.
Methods: All specimens (10 x 64 x 32 mm.3 ) were divided into 5 groups. The control group was PMMA without any reinforcements. The experimental groups were PMMA reinforced with industrial short-rod glass fiber, which divided into untreated group (F), treated with silane coupling agent group (S), microwave group (M) and silane coupling agent combine with microwave group (MS). Each experimental group was divided into five subgroups by the mass ratio (%) of the glass fiber; which were 1, 3, 5, 10 and 15 respectively. The flexural properties were evaluated by a threepoint bending test. The data were then analyzed by two-way ANOVA and multiple comparison (α=0.05).
Results: There were no significantly differences of the flexural strength between the control and the experimental groups. Among all groups, the 1% MS group has the highest flexural strength of 93.70 ± 3.11 MPa. It was found that the flexural modulus increase with an addition of the glass fibers.
Conclusion: Surface treatment with silane coupling agent played an important role in increasing the flexural strength of the glass fiber-reinforced PMMA.
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