二氧化硅改性聚丙烯复合材料的性能研究

Study on Properties of Silica-Modified Polypropylene Composites

中空二氧化硅(SiO_(2))是一种特殊的新型无机化合物,由于其内部的晶体结构,具有一个或者多个空腔,除此之外还具有来源广、低密度、高比表面积和优异的吸附效果,这就决定了其可以用来填充改性高分子材料。选取SiO_(2)通过简单的熔融共混法来填充改性聚丙烯(PP),加入了改性聚丙烯充当相容剂,研究了SiO_(2)的含量对PP复合材料的拉伸强度、冲击强度和熔体流动速率等影响。结果显示:改性聚丙烯的加入能够起到良好的相容性,适量的SiO_(2)可以提高聚丙烯复合材料的拉伸强度、断裂伸长率和熔体流动速率,但添加过量会使聚丙烯复合材料的力学性能及熔体流动速率下降。选用无机材料来改性聚合物已成为一种趋势,相信在未来,会有更多的新型复合材料诞生。

Hollow silicon dioxide(SiO_(2))is a special new inorganic compound,due to its internal crystal structure,with one or more cavities,in addition to a wide source,low density,high specific surface area and excellent adsorption effect,which determines that it can be used to fill modified polymer materials.Modified polypropylene(PP)was filled with SiO_(2)by a simple melt blending method,and modified polypropylene was added as a compatibler.The effects of SiO_(2)content on the tensile strength,impact strength and melt flow rate of PP composites were studied.The results show that the addition of modified polypropylene can play a good compatibility,and appropriate SiO_(2)can improve the tensile strength,elongation at break and melt flow rate of polypropylene composite,but the addition of excessive will reduce the mechanical properties of polypropylene composite and melt flow rate.The selection of inorganic materials to modify polymers has become a trend,I believe that in the future,there will be more new composite materials born.