牙科用玻璃纤维增强复合树脂的研究

目的：研究玻璃纤维增强丙烯酸树脂的力学性能。方法：将Ｅ玻璃纤维按６１．９７％、７２．６０％、７７．６８％（重量比），与丙烯酸树脂制成单向玻璃纤维增强复合材料，并测试其弯曲强度、弯曲模量和面内剪切强度。结果：随着纤维比例的提高，复合材料的弯曲强度有显著性增加（Ｐ＜０．０５），达（１３２９．４６±８５．１３）ＭＰａ。７２．６０％组和７７．６８％组与６１．９１％组相比，弯曲模量提高非常显著（Ｐ＜０．０１），达（３４．０６±３．５８）ＧＰａ；面内剪切强度降低非常显著（Ｐ＜０．０１），为（５３．５２±４．６２）ＭＰａ。结论：玻璃纤维对丙烯酸树脂的弯曲性能具有增强作用。

Mechanical property reinforcement of composite resin by glass fibers

Objective: To study the possibility of mechanical property reinforcement of acrylic resin by glass fibers. Methods: 61.97%, 72.60% and 77.68%(w/w) of Eglass fibers were added into acrylic resin respectively to prepare composite resin in a unilateral form. The transverse strength, shear strength and fracture load of the resins were measured. Result: The fracture load and Young's moduls of the composite resins were increased and the shear strength was decreased significantly with the increase of Eglass fiber amount (P<0.01). The highest fracture load and Young's moduls values were obtained in the composite resin with 77.68% Eglass fibers and were (1 329.4685.13) MPa and (34.063.58) GPa respectively; while the lowest shear strength (53.524.62) MPa. Conclusion: The bending strength of composite resin can be reinforced and shear strength may be decreased by the incorporation of glass fibers.