GF增强母粒对微发泡PP/GF复合材料力学性能的影响

Effect of GF Reinforced Masterbatch on Mechanical Performances of Microcellur Foam PP/GF Composites

采用熔融共混挤出的方法制备了A、B两种玻璃纤维(GF)增强母粒。将两种母粒与自制发泡母粒、助剂母粒按一定比例混合,在二次开模条件下制备了PP/GF复合微发泡材料,研究了两种GF增强母粒对微发泡PP/GF复合材料力学性能的影响,同时还探讨了结晶行为对微发泡复合材料力学性能的影响。结果表明:A母粒制备的微发泡PP/GF复合材料性能优于B母粒,在GF含量为30%时,A母粒制备的微发泡复合材料的拉伸强度和冲击强度分别为55.72 MPa、7.58 kJ/m2,与B母粒制备的发泡PP/GF复合材料比较,其拉伸强度和冲击强度分别提高了9.97 MPa、1.1 kJ/m2。

Two kinds of GF reinforced PP masterbatch were prepared through extrusion melt blending method. Mixing homemade foaming masterbatch, additives masterbatch and two kinds of GF masterbatch （A and B）according to a cirtain proportion, the micro-foamed PP/GF composite was prepared under the twice-mold-opening condition. The effects of GF reinforced PP masterbatch and the crystallization behavior on the mechanical performances of micro-foamed PP/GF composite were researched. The results indicate that： the mechanical performance of PPIGF microcellular foam material prepared by A masterbatch is better than that of PP/ GF microcellular foam material prepared by B masterbatch. The tensile strength and impact toughness of the foamed PP/GF contained with A masterbatch are respectively 55.72 MPa and 7.58 k Jim2, compared to PP/GF microcellular foam material contained with B masterbatch, the tensile strength and impact toughness increase by respectively 9.97 MPa and 1.1 k Jim2.