玻璃纤维增强微孔发泡聚丙烯材料性能研究

摘要

The microcellular foam PP materials reinforced by glass fiber ( GF ) were prepared by second-open molding. The influence of the content and slenderness ratio of GF to the mechanical properties of microcellular foam PP materials was studied. The microstructure of foams samples was characterized using scanning electron microscope. The results showed that the tensile and flexural strength increased obviously with the increasing content of the GF, and the notch impact strength decreased. The GF with the slenderness ratio of 13:3 had the larger flexural strength than the GF with the slenderness ratio of 10:3. The addition of glass fiber inhibited the growth of the bubble hole, but overall, little changed in the extent of cell size, basically 20~40 μm.%通过二次开模注射成型法制备了玻璃纤维增强微孔发泡PP复合材料，研究了玻纤的含量及长径比对微孔发泡PP复合材料力学性能的影响，用扫描电镜对发泡样品的微观形貌进行了表征。结果表明：玻纤的加入可显著改善微孔发泡PP体系的抗拉强度和弯曲强度，但冲击韧性却不断下降。长径比为13：3的玻纤相对于10：3对PP微孔发泡体系增强效果要好，尽管玻纤的加入抑制了泡孔的长大，但是总体上来看，泡孔的尺寸在20~40μm。