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采用共混浇注方法制备了强度、硬度、耐磨性、耐水性和导热性等综合性能良好的聚氨酯/聚甲基丙烯酸甲酯/Kevlar纤维体系(PU-PMMA-Kevlar),系统研究了不同配比时各个体系的力学和耐磨等性能,并利用扫描电子显微镜等手段观察了各个体系的微观形貌,从而得出各个体系的最佳配比。以含30%(wt,质量分数,下同)PMMA的PUPMMA互穿网络体系作为基体,分别加入了Kevlar纤维和石墨烯:当纤维的质量百分数为1%,材料的拉伸强度为21.26MPa,比原来上升了50%,同时断裂伸长率上升45%、压缩强度上升166%、缺口抗冲击强度上升69%、相对体积磨耗量下降28%、吸水系数下降近60%。
The polyurethane / PMMA / Kevlar fiber system (PU-PMMA-Kevlar) with good comprehensive properties such as strength, hardness, abrasion resistance, water resistance and thermal conductivity was prepared by the method of blending and casting. Than when the mechanical and wear performance of the various systems, and the use of scanning electron microscopy and other means of observation of the microscopic morphology of the various systems, resulting in the best ratio of the various systems. The PUPMMA interpenetrating network system containing 30% (wt, mass fraction, the same below) PMMA was used as the matrix, Kevlar fibers and graphene were added respectively. When the mass percentage of the fiber was 1%, the tensile strength of the material was 21.26 MPa, 50% more than the original, 45% increase in elongation at break, 166% increase in compressive strength, 69% increase in notched impact strength, 28% decrease in relative volumetric wear and 60% decrease in water absorption coefficient.