苎麻布/聚丙烯复合材料的力学性能  

Mechanical properties of ramie cloth/polypropylene composites

作　　者：雷文[1] 张长生[1] 

机构地区：[1]南京林业大学信息科学与技术学院,南京210037

出　　处：《复合材料学报》2008年第1期40-45,共6页Acta Materiae Compositae Sinica

基　　金：江苏省高校自然科学研究项目(06KJD220083)

摘　　要：利用聚丙烯及苎麻布作原料、马来酸酐接枝聚丙烯(MAPP)作界面增容剂,采用模压工艺,在175℃,5、10、15及20 MPa四种压力下成型复合材料,研究了MAPP质量分数、苎麻布质量分数及成型压力对复合材料力学性能的影响。复合材料的拉伸强度和弯曲强度在MAPP加入量为3%和5%时分别达最大值46.72 MPa和68.43 MPa,较无MAPP的复合材料的强度值分别提高50.95%和61.81%;拉伸模量及弯曲模量因使用MAPP而增加,但拉伸断裂伸长率却会下降。随着苎麻布质量分数增加,复合材料拉伸强度、拉伸模量、弯曲模量均逐渐增加;苎麻布质量分数10%、20%的复合材料在较低的压力(5、10 MPa)下成型时,其拉伸强度和弯曲强度值相对更高,当苎麻布质量分数超过20%后,成型压力对力学性能的影响无明显的规律。Using polypropylene（PP） and ramie cloth as raw materials, and maleated polypropylene（MAPP） as the compatibilizer, the composites were compressed at 175℃ under 5, 10, 15 and 20 MPa, respectively. The effects of the mass fractions of both MAPP and ramie cloth and pressures on the mechanical properties of the composites were investigated. The maximum tensile strength of 46.72 MPa and flexural strength of 68.43 MPa of the composites are obtained when 3% and 5% MAPP are used, which are increased from those of the composites without MAPP by 50.95% and 61. 81%, respectively. Both the tensile and flexural moduli increase because of the application of MAPP,while the elongations at break will decrease. When more ramie cloths are used, the modulus always increa- ses; the composites containing 10 % or 20 % ramie cloth have greater strength when formed under lower pressures（5, 10 MPa）, but no regulations can be found for the effects of pressures on the strength when the mass fractions of ramie cloth are more than 20 %.

关 键 词：复合材料 聚丙烯 苎麻布 马来酸酐接枝聚丙烯 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]