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Preparation and mechanical properties researches of silane coupling reagent modified β-silicon carbide filled epoxy composites

机译：硅烷偶联剂改性的β-碳化硅填充环氧复合材料的制备及力学性能研究

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摘要

The β-silicon carbide (β-SiC) micro particles modified by silane coupling reagent of γ-glycidoxy propyl trimethoxy silane (KH-560) were employed to prepare β-silicon carbide/epoxy resin (SiC/EP) by blending-casting moulding method to acquire polymer composites with high mechanical properties. Mechanical tests demonstrate that, both the flexural and impact strength of the composites increased firstly with the increasing content of SiC, but decreased with excessive addition of SiC. When the mass fraction of SiC was 10%, the mechanical properties of SiC/EP composites were maximum. Meantime, the use of SiC particles modified by KH-560 significantly enhanced mechanical properties of SiC/EP composites. The surface performance of SiC was characterized and analyzed by XPS, FTIR and TGA. The results indicated that a chemical bonding formed between KH-560 and SiC, and a layer of organic single molecule membrane formed on the surface of SiC. And the maximum mass fraction of KH-560 coated on the surface of SiC was about 2.62%.
机译：用γ-环氧丙氧基丙基三甲氧基硅烷（KH-560）的硅烷偶联剂改性的β-碳化硅（β-SiC）微粒通过共混浇铸成型制备β-碳化硅/环氧树脂（SiC / EP）获得具有高机械性能的聚合物复合材料的方法。力学测试表明，复合材料的弯曲强度和冲击强度均随SiC含量的增加而增加，而随SiC含量的增加而降低。当SiC的质量分数为10％时，SiC / EP复合材料的机械性能最大。同时，通过KH-560改性的SiC颗粒的使用显着增强了SiC / EP复合材料的机械性能。用XPS，FTIR和TGA对SiC的表面性能进行了表征和分析。结果表明，KH-560与SiC之间形成化学键，在SiC表面上形成一层有机单分子膜。涂在SiC表面的KH-560的最大质量分数约为2.62％。

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