Study on properties of heat-resistant resin binder for superhard abrasive tools
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摘要: 采用甲基三甲氧基硅烷(MTMS)为改性剂,通过酯交换方式制备出有机硅酚醛树脂(SPF),并用傅里叶变换红外光谱分析、热重分析、力学性能测试等表征方法对SPF进行测定。结果表明: MTMS被成功引入SPF树脂结构中,且SPF耐热性能优良,受热质量损失10%时温度为462 ℃,较普通酚醛树脂(PF)的温度提高了90 ℃。与以PF为结合剂的超硬磨具相比,以SPF为结合剂制造的超硬磨具的力学性能明显提高,磨削比提高了51.1%;同时,后者的弯曲强度和冲击强度较前者的分别提高了14.2%和5.7%。Abstract: A silicone phenolic resin (SPF) was synthesized by transesterification using methyltrimethoxysilane(MTMS) as a modifier. The SPF was determined by FTIR analysis, TGA analysis, mechanical property test and other characterization methods. The results show that MTMS is successfully introduced into the structure of the resin; the resin has excellent heat-resistance, whose temperature at weight loss 10% is 462 ℃, 90 ℃ higher than that of ordinary phenolic resin(PF); the mechanical performance is obviously improved and the grinding ratio of superhard abrasive tools with SPF as resin binder is 51.1% higher than that of superhard abrasive tools with PF as resin binder. Meanwhile, the bending strength and impact strength of superhard abrasive tools with SPF as resin binder are 14.2% and 5.7% higher than that of another one, respectively.
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Key words:
- silicon phenolic resin /
- superhard abrasive tools /
- thermal stability /
- grinding ratio
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