悬浮聚合酚醛树脂基制动材料的摩擦学性能

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采用悬浮聚合法制备热固性酚醛树脂，通过红外光谱分析和热重分析对该悬浮聚合酚醛树脂（suspension．polymerizationphenolicresin，缩写为SPPR）的结构和热学性能进行分析。用模压成形工艺制备树脂基制动复合材料，利用JF150D-Ⅱ型摩擦磨损试验机测试该材料与HT250灰铸铁在100～350℃盘面温度范围内的滑动摩擦性能。结果表明，SPPR的热分解温度为396℃，在400℃时质量损失率为12．7％，具有较好的热稳定性。经过正交试验得到树脂基制动复合材料的优化配方，制备的复合材料和HT250灰铸铁对摩，在100～350℃升温过程中，摩擦因数平均值为0．41，波动值为0．07，350℃的摩擦因数和最大摩擦因数的比值（μ350℃/μmax）为1。和国内外优质产品相比，该复合材料的摩擦因数适中，磨损率较低，摩擦稳定性和抗热衰退性能优异。 Thermosetting phenolic resins were synthesized by suspension polymerization （SPPR）. The structure and thermal properties of the resin were analyzed by infra-redspectrum, thermo mass （gravimetric） analysis. The brake composites based on SPPR for automobile were prepared by compression molding. The effect of operating temperature on the dry sliding friction and wear properties of brake composites was investigated. The sliding experiments were carded out on a model JF150D-II pin-on-disc tribometer at selected temperatures in the range of 100℃-350 ℃. The results show that thermal decomposition temperature of the thermosetting phenolic resins is 396℃ and losing mass is 12.7% at 400℃ with excellent thermal performance. When the SPPR-based brake composites was fractionized coupling with HT250 cast iron fiat at a temperature range from 100℃ to 350 ℃, the maximum fluctuation of friction coefficient is 0.07 with the average of 0.41, and the ratio of the friction coefficient at 350℃ versus the maximal friction coefficient （μ350/μmax） is 1.Test result indicates that the brake composite shows excellent friction stability at different temperatures, low wear rate and good thermal fade resistance.