纳米碳酸钙作为环氧树脂增韧材料的研究

文中研究了纳米碳酸钙作为增韧填料对环氧树脂力学性能的影响。纳米碳酸钙经表面处理后，填充到环氧树脂体系中，使环氧树脂拉伸强度提高39%、弯曲弹性模量增大52.9%、冲击强度提高68.6%。冲击断面SEM照片分析结果表明，改性纳米碳酸钙在环氧树脂中能够均匀分散，并在纳米碳酸钙和其周围的基体界面相出现大量的银纹，从而提高了复合材料的抗冲击强度。

Mechanical properties of epoxy composite with nano-sized calcium carbonate fillers

This paper focus on the influence of the nano-sized calcium carbonate particle on the mechanical properties of epoxy resin. The nano-sized CaCO_3 was treated by a dry modification routine, and then added to epoxy resin as filler to improve its mechanical properties. The results show that the tensile strength increases 39%, flexural elastic modulus enhances 52.9%, and the impact strength is improved 68.6%. At last, the mechanism of nano CaCO_3 improving epoxy resin was discussed by SEM photograph. The homogeneous dispersion of the modified nano CaCO_3 in the epoxy resin and the formation of many silver grains on the rupture surfaces remarkably improve the impact strength of the composites.