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通过熔融混炼并挤出压延成型制备了ＬＭＰＭ／ＰＰ原位复合材料，研究了原位复合材料的拉伸性能和冲击性能。结果表明ＬＭＰＭ能在ＰＰ基体中形成微纤增强相，使材料的拉伸强度成倍增加，冲击韧性也比纯ＰＰ高。ＬＭＰＭ／ＰＰ原位复合材料的力学强度与偶联剂用量、ＬＭＰＭ用量有关，在ＬＭＰＭ微纤的取向方向和垂直方向，力学强度也有很大差异。当ＬＭＰＭ用量为２０％，ＤＢＴＬ为１．０％，或ＮＤＺ为０．７％时，ＬＭＰＭ／ＰＰ原位复合材料在平行于微纤方向的拉伸强度为１４０～１５０ＭＰａ，是纯ＰＰ的３．９～４．１倍，垂直于微纤方向的拉伸强度为５９～７０ＭＰａ，是纯ＰＰ的１．６３～１．９３倍，平行于微纤方向的冲击强度为６０～７０Ｊ／ｍ，是纯ＰＰ的１．６２～１．８９倍，垂直于微纤方向的冲击强度为３８～４５Ｊ／ｍ，略高于纯ＰＰ。
The LMPM / PP in-situ composites were prepared by melt-kneading and extrusion-calendering. The tensile properties and impact properties of in-situ composites were investigated. The results show that LMPM can form micro-fiber reinforced phase in PP matrix, which makes the tensile strength of the material double and the impact toughness higher than pure PP. The mechanical strength of LMPM / PP in-situ composites is related to the amount of coupling agent and LMPM dosage. There is also great difference in the mechanical strength of LMPM microfibers in orientation direction and vertical direction. When the amount of LMPM is 20%, the DBTL is 1.0%, or the NDZ is 0.7%, the tensile strength of LMPM / PP in-situ composites in the direction parallel to the microfibril is 140 ~ 150MPa, which is pure PP 3 .9 to 4.1 times, perpendicular to the direction of the micro-fiber tensile strength of 59 ~ 70MPa, 1.63 to 1.93 times the pure PP, parallel to the direction of micro-fiber impact strength of 60 ~ 70J / m, 1.62 to 1.89 times that of pure PP, and the impact strength perpendicular to the direction of microfibril is 38 ~ 45J / m, slightly higher than that of pure PP.