STF微胶囊增韧PP  

Polypropylene Toughened by Shear Thickening Fluid Microcapsules

作　　者：雷凯[1] 潘泳康[1] 

机构地区：[1]华东理工大学材料科学与工程学院上海市先进聚合物材料重点实验室,上海200237

出　　处：《塑料》2015年第5期4-6,10,共4页Plastics

基　　金：国家自然科学基金(51173041)

摘　　要：以聚丙二醇600(PPG 600)为液体分散介质,以纳米二氧化硅(nano-Si O_2)为分散相粒子制备PPG 600体系的剪切增稠流体(PPG-STF),并对其进行包裹得到芯材为PPG-STF的微胶囊。在此基础上,将PPG-STF微胶囊与聚丙烯(PP)熔融共混,通过PPG-STF的剪切增稠特性对PP进行增韧。研究了PPG-STF的流变性能、PPG-STF微胶囊的粒径分布和表观形貌,以及PPG-STF微胶囊对PP的增韧效果及其作用机理。结果表明:PPG-STF在大于1 Hz的振荡频率下具有明显的增稠效应;PPG-STF微胶囊增韧PP的冲击强度最大可达到纯PP的3.5倍。Shear thickening fluids were prepared with nano-SiO2 as dispersed phase particle and PPG 600 as liquid dispersion medium. Then a series of mierocapsules containing PPG-STF were synthesized. On this basis, PP was melt blended with microcapsules containing PPG-STF, which could play the toughening effect on matrix through shear thickening effect. Rheological behavior of PPG-STF, particle size distribution and morphology of PPG-STF microcapsules were investigated. Meanwhile, the toughening effect and mechanism of PPG-STF microcapsules on PP were researched. The results showed that shear thickening effeet of PPG-STF was evident under oscillation frequency larger than 1 Hz, the maximum impact strength of PP toughened by PPG-STF microeapsule could reach 3.5 times that of the pure PP.

关 键 词：剪切增稠流体 微胶囊 增韧 冲击性能 聚丙烯 

分 类 号：TQ322[化学工程—合成树脂塑料工业] TQ327