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1·It shows that the composites' tensile strength and elongation decrease while the hardness and friction coefficient increase with the addition content of graphite.

结果表明，随着石墨添加量的增加，复合材料的抗拉强度和伸长率逐渐下降，硬度逐渐上升，摩擦系数逐渐变大。

2·It was found that the friction coefficient, break strength, elongation at break and the surface hydrophilicity of PPS fiber had changed after the modification.

实验发现通过等离子体处理后，纤维表面摩擦系数、断裂强度、断裂伸长率以及润湿性等性能都有了明显变化。