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研究了基体树脂的性质及基体配方中炭黑、结晶成核剂、接枝极性基团的功能化聚丙烯(PP)等对玻璃纤维毡增强PP复合材料力学性能的影响。结果表明:提高基体树脂熔体的流动性,有利于复合体系的浸渍过程;复合材料的弯曲强度及模量随基体树脂强度及模量的增大而提高;采用韧性较好的PP或PP增韧体系作为基体,可获得抗冲性能较好的复合材料;随着炭黑加入,复合体系的弯曲及冲击强度有所下降;结晶成核剂的加入,可改善复合体系的拉伸、弯曲及冲击强度;功能化PP的加入,可提高复合体系的界面结合强度,有利于材料力学性能的提高。
The properties of matrix resin and the effect of carbon black, crystal nucleating agent and functionalized polypropylene (PP) grafted with polar groups on the mechanical properties of glass fiber mat reinforced PP composites were studied. The results show that the flexural strength and modulus of the composites increase with the increase of the matrix resin strength and modulus, while the fluidity of the matrix resin melt increases, which is favorable for the impregnation of the composites. As the matrix, the composite with better impact resistance can be obtained. With the addition of carbon black, the bending and impact strength of the composite decrease. The addition of crystal nucleating agent can improve the tensile, Impact strength; functionalized PP can improve the interfacial bonding strength of the composite system, which is conducive to the improvement of the mechanical properties of the material.