矿物纤维增强PP/EVA复合材料力学性能的研究

Mechanic Properties of Mineral Fiber Reinforced PP/EVA Composites

针对弹性体乙烯-醋酸乙烯酯(EVA)增韧聚丙烯(PP)造成力学强度下降严重的问题,以3种硅烷偶联改性的矿物纤维(玄武岩、水镁石、硅灰石)作为增强体填充PP/EVA体系,并采用偏光显微镜(POM)和扫描电子显微镜(SEM)对复合材料进行观察,探究了硅烷偶联剂和矿物纤维对PP/EVA复合材料力学性能的影响。结果表明:经酸刻蚀并硅烷偶联处理的玄武岩纤维(SSiX)增强最好,制备的PP/EVA/SSiX复合材料与PP/EVA复合材料相比,其拉伸强度、弯曲强度和冲击强度分别提高了111%,108%,29.30%。

In view of the problem of serious decline in the mechanical strength of EVA toughened PP, three kinds of mineral fibers （basalt, brucite, wollastointe） all modified by different silane coupling agents were used as reinforcement filler in the PP/EVA composites. The influences of three mineral fibers on mechanical properties of PP/EVA composites were researched by POM, SEM and mechanical property tests. The results showed that the reinforcement effect of basalt fiber（SSiX） modified by acid etch and silane coupling agent was best. Compared with PP/EVA composites,the tensile strength, flexural strength and impact strength of PP/EVA/SSiX composites were increased by 111%, 108% and 29. 30%, respectively.