Mechanical properties of preimpregnated glass fiber reinforced composite resins / 华西口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the mechanical properties of two kinds of composite resins reinforced by preimpregnated glass fibers.</p><p><b>METHODS</b>Sinfony and belleGlass composite resins were used to make standard samples (25 mm x 2 mm x 2 mm) with and without glass fibers. After all specimens were stored for 24 hours in distilled water at (37 +/- 1) degrees C, the flexural strength and flexural modulus were measured on a universal test machine.</p><p><b>RESULTS</b>Both flexural strength and flexural modulus of Sinfony composite reinforced by the glass fibers became significantly increased, which were (555.76 +/- 67.31) MPa and (12.59 +/- 3.06) GPa respectively, and 4.5 and 2.5 times much more than those of the specimens without glass fibers (P = 0); the flexural modulus of belleGlass composite became significantly increased, which was (14.10 +/- 2.88) GPa, and 0.9 time much more than the specimens without glass fibers (P = 0), but the improvement of flexural strength was not significant.</p><p><b>CONCLUSION</b>Glass fibers can improve the mechanical properties of composite resins, but the reinforcement effect is different between different resins.</p>