基体树脂与短玻纤对聚丙烯复合材料性能影响研究

Effect of Matrix Resin and Glass Fiber on Properties of Polypropylene Composites

选取不同熔体流动速率(MFR)的均聚聚丙烯(i-PP)、共聚聚丙烯(co-PP)作为基体树脂,研究短玻纤(GF)对不同类型聚丙烯复合材料力学性能以及MFR的影响。结果表明:聚丙烯基体种类对复合材料的MFR以及冲击强度起关键作用。随着GF含量的增加,聚丙烯复合材料的拉伸强度、弯曲模量逐渐增加,收缩率逐渐降低,冲击强度变化幅度较小。随着取向角度逐渐增加,聚丙烯复合材料的拉伸强度迅速下降。当取向角度为90°,材料的拉伸强度低于取向角度为0时的1/2。

Homo-polypropylene(i-PP) and co-polypropylene(co-PP) with different melt flow rates(MFR) were selected as matrix resins to study the effect of short glass fiber(GF) on the mechanical properties and MFR of different types of polypropylene composites. The results show that the type of polypropylene matrix plays a key role in the MFR and impact strength of the composites. With the increasing of GF content, the tensile strength and flexural modulus of polypropylene composites increase gradually, the shrinkage rate of polypropylene composites decreases gradually, and the impact strength of polypropylene composites changes slightly. With the increasing of orientation angle, the tensile strength of polypropylene composites decreases rapidly. When the orientation angle is 90°, the tensile strength of the material is lower than 1/2 of that orientation angle is 0.