无机填料改性聚丙烯的力学性能研究

Study on Mechanical Properties of Polypropylene Modified by Inorganic Fillers

无机填料改性聚丙烯是一种兼具良好韧性和刚性的方法,本实验研究无机填料碳酸钙(CaCO_3)、硫酸钙(CaSO_4)和高岭土对聚丙烯(PP)力学性能的影响。采取拉伸试验、弯曲试验、冲击试验分别对不同比例的PP/无机填料进行测验。结果表明:当CaSO_4含量比例为8%时,材料的冲击性能达到最高值为5.91k J/m^2。当无机填料填充量为6%时,填料对PP的增强效果最好,PP/CaCO_3、PP/高岭土和PP/CaSO_4复合材料的拉伸性能达到最佳。当填充量为4%时,PP复合材料的弯曲强度达到最大,但随着份数的增加,对弯曲强度影响不明显。

Using inorganic filler to modify Polypropylene is a kind of method with good toughness and rigidity. This experiment studies the effect of inorganic filler calcium carbonate（CaCO3）,calcium sulphate（CaSO4） and kaolin on the mechanical behavior of polypropylene（PP）. I adopt tensile test,bend test and impact test to examine the effect of different proportions of PP/inorganic fillers on the mechanical behavior of polypropylene（PP）. It turned out that When CaSO4 content is 8%,the impact of the material performance peak 5. 91 k J/m^2,When the inorganic filler filled quantity of 6%,the effect on packing of PP enhancement is best. And under this condition the tensile properties of the composites can achieve the best when the composite materials consist of PP/CaCO3,PP/kaolin or CaSO4/PP. When the content of inorganic filler was 6%,the filler had the best enhancement effect on PP,and the tensile properties of PP/CaCO3,PP/kaolin and PP/CaSO4 composites were the best. But along with the increasing quantity of inorganic filler,the influence on the bending strength is on the decline.