The effects of lemon gypsum and the surface treatment lemon gypsum on the mechanical properties,micro morphology,crystallinity and melting point of PP composites were investigated.The results indicate that the tensile strength,bending strength,and bending modulus of the composites are increased,and the surface treatment effectiveness of aluminum coupling agent and titanate coupling agent is good.The SEM results show that dispersion of the lemon gypsum treated by coupling agent in PP is better than that of surface untreatment lemon gypsum in PP.The DSC results show that the crystallinity of PP is increased,while the melt point of PP is almost unchange when PP is filled with lemon gypsum.The crystallinity and melt point of PP are not influenced by surface treatment of lemon gypsum,compared with those of PP filled by surface untreatment lemon gypsum.%研究了柠檬石膏及表面处理柠檬石膏对聚丙烯(PP)复合材料的力学性能、微观形貌、结晶度、熔点的影响.结果表明:柠檬石膏的加入使复合材料的拉伸强度、弯曲强度和弯曲模量有不同程度提高,用钛酸酯和铝酸酯偶联剂对柠檬石膏进行表面处理后效果较好.扫描电镜(SEM)分析结果显示经过偶联剂表面处理的柠檬石膏在PP中分散的较未处理的柠檬石膏均匀.差示扫描量热(DSC)结果表明:柠檬石膏的加入在提高PP的结晶度同时,对复合材料的熔点几乎没有影响;相比未表面处理的柠檬石膏,表面处理后的柠檬石膏对复合材料中PP的结晶度和熔点均没有显著影响.
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