中空玻璃微珠粒度分布与填充聚丙烯力学性能的灰色关联分析

Grey Relationship between Size Distribution of Hollow Glass Beads and Mechanical Properties of Filled Polypropylene Composites

为考察中空玻璃微珠(HGB)粒度分布对聚内烯(PP)复合材料力学性能的影响,应用简支梁冲击实验机和万能试验机分别测量了 HGB 填充 PP 复合材料的冲击性能和拉伸性能,采用灰色关联分析原理汁算了 HGB 的粒度分布与填充 PP 复合材料冲击强度和拉伸强度的灰色关联度。结果表明,HGB 中粒度在100.60～256.00 μm之间的颗粒的体积分数与冲击强度、拉伸强度及断裂伸长率的灰色关联度最大,即为关键子因子;粒度在0～24.72μm的颗粒对提高复合材料冲击强度有促进作用,对提高复合材料拉伸强度和断裂伸长率有削弱作用;粒度在24.70～256.00 μm之间的颗粒对提高复合材料冲击强度有削弱作用,而对提高复合材料拉伸强度和断裂伸长率有促进作用。

The impact and tensile strengths of hollow glass bead filled polypropylene （PP/HGB） were measured using Charpy impact tester and universal test machine. The relationship between the HGB size distribution and the mechanical properties was analyzed by means of grey relational rule. The results indicated that the volume fraction of particles with size range from 100.60 to 256.00μm had major effect on the mechanical properties of PP/HGB composite. Those from 24.72 to 256.00μm may improve the tensile properties but weaken the impact strength, however, those below 27.72 μm may weaken the tensile properties but enhance the impact strength.