摘要
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 in situ
composites of low melting point metal and polypropylene were prepared by mixing, extructing
and calendring. The mechanical properties of LMPM/PP in situ composites were studied. The
results show that LMPM can form in situ a reinforced fibril phase in PP matrix and make
remarkable increase of tensile strength,and izod impact toughness is also higher than that of
pure PP. It is found that the mechanical properties LMPM/PP in situ composites are related to
LMPM content and coupling agent content and have anisotropy. When LMPM content is 20%
and is treated with 1.0% DBTL or 0.7% NDZ,the tensile strength is 140￣150 MPa which
increases 2.9￣3.1 times than that of pure PP and izod impact toughness is 59￣70 J/m which
increases 62%￣89% than that of pure PP in parallel fibril direction, and the tensile strength is
60￣70 MPa which increases 63%￣93% than that of pure PP and the izod impact toughness is
38￣45 J/m which is slight higher than that of pure PP in perpendicular fibril direction.
基金
教育部博士点基金
武汉市晨光计划的资助
