聚丙烯/PE-g-MAH/纳米SiO_2复合材料性能研究  

Study on the Properties of Polypropylene/PE-g-MAH/Nano-SiO_2 Composites

作　　者：曲宁[1] 付一正[1] 王可信[1] 李炳海[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《中国塑料》2005年第7期17-20,共4页China Plastics

基　　金：国家自然科学基金资助项目(20074019)

摘　　要：以PE-g-MAH(马来酸酐接枝聚乙烯)作为聚丙烯(PP)/纳米二氧化硅(SiO2)共混物的增容剂,通过不同的加工工艺制备了聚丙烯/PE-g-MAH/纳米SiO2复合材料,考察了不同处理方法及用量的纳米SiO2对PP基体的影响。结果表明:经表面处理,用量为4％的纳米SiO2和3％PE-g-MAH协同作用对PP的改性效果最好,冲击强度提高30％,弯曲强度提高10％,而改性PP的拉伸强度与未改性PP保持一致,且对嵌段共聚聚丙烯(PP-B)的改性效果优于无规共聚聚丙烯(PP-R)。同时,PP/PE-g-MAH/纳米SiO2复合材料的耐热性得到明显提高,较PP基体提高22℃,增幅为20％。Polyethylene-graft-maleic anhydride（PE-g-MAH） was added into nano-SiO2/PP blending as a bulk filler and the nano-SiO2/PE-g-MAH/PP composites were made through two different processes.The properties of PP matrix with varied contents and types of nano-SiO2 were studied. The experimental results indicate that the composite with 4 % treated nano-SiO2 and 3 % PE-g-MAH has the best mechanical properties, the notched impact strength increases by 30 %, bending strength increases by 10 %, at the same time, tensile strength keeps the same level as pure PP. It is also proved that the modifying effect on PP-B is much better than that on PP-R. Meanwhile, nano-SiO2/PE-g-MAH plays a dominant role on improving heat resistance of the composites. The heat resistance temperature is improved by 22 ℃ （20 %）.

关 键 词：纳米二氧化硅 马来酸酐接枝聚乙烯 聚丙烯 耐热性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]