碱式硫酸镁晶须/聚丙烯复合材料力学性能的研究  

Study on the Mechanical Properties of Magnesium Oxysulfate Whiskers and Polypropylene Composites

作　　者：姜玉芝[1] 张丽丽[1] 张忠阳[1] 王利华[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159

出　　处：《沈阳理工大学学报》2012年第4期60-63,71,共5页Journal of Shenyang Ligong University

摘　　要：以聚丙烯(PP)为基料,表面改性后的碱式硫酸镁晶须(MOS)为填充料,制备MOS/PP复合材料,研究不同改性剂处理的MOS及用量对PP复合材料力学性能的影响。结果表明,硬脂酸锌改性的MOS/PP复合材料的力学性能优于微乳液改性和未改性的性能,当硬脂酸锌改性的MOS加入量为20%(质量分数wt)时,复合材料的综合力学性能最佳:抗拉强度44.91MPa,弹性模量309.66MPa,冲击强度3.75kJ/m2,断裂伸长率41%。复合材料的界面结构研究表明,未改性的MOS、硬脂酸锌改性的MOS和微乳液改性的MOS与PP基体间均无化学键形成。分析研究了MOS的作用机理。The MOS/PP composites is prepared by using PP as base material and surface modified basic magnesium sulfate whisker as filler in this study. The influences of various types of modified MOS and the amount of MOS used as filler on the mechanical properties of PP composites are also examined in this paper. The results indicate that the performance of the MOS/PP composites modified by zinc stearate is superior to the unmodified or MOS/ PP composites modified by microemulsion. Moreover, the overall mechanical performance of the MOS/PP composites reaches its maximum when the zinc stearate modified MOS oc- cupies 20% of total mass： the tensile strength is 44.91 MPa, the elastic modulus is 309.66 MPa, the impact strength is 3.75kJ/m2 and the elongation at break 41%. Moreover, the study on the interface structure of composite material reveals that no chemical bond has been formed between the PP as base material and the three types of filler, which are the unmodi- fied MOS, zinc stearate modified MOS and the microemulsion modified MOS. Lastly, the reacting mechanism of the MOS is also analyzed.

关 键 词：碱式硫酸镁晶须 聚丙烯 复合材料 力学性能 作用机理 

分 类 号：TB332[一般工业技术—材料科学与工程]