聚丙烯／尼龙6／纳米蒙脱石复合材料的制备及热性能研究

Study on Preparation and Thermal Property of PP/PA6/MMT Nano-composite

采用熔融插层法成功制备了聚丙烯(PP)/尼龙6(PA6)/有机化蒙脱石(OMMT)纳米复合材料。用X射线衍射分析(XRD)和透射电镜(TEM)观察了OMMT层间距的变化和材料的结构;用示差扫描量热法(DSC)和热重分析(TG)研究了热性能,并考察了纳米复合材料的拉伸强度。研究结果表明,OMMT的层间距由2.200 nm扩大到2.800 nm,PP/PA6合金高分子链取代了有机化蒙脱石层间的十六烷基三甲基溴化铵而进入到蒙脱石的片层间,加入质量分数为4%的OMMT的复合材料不仅使材料的拉伸强度提高了约15%,还提高了材料的热稳定性,使剩炭率增加了8.1%。

PP/PA6/MMT nano-composite was prepared by means of melt intercalation. The changes of the interlamellar space of OMMT and the structure of the composite, were investigated by means of XRD and TEM. The thermal properties were studied by means of DSC and TG, and the tensile strength of the composite was also tested. The results showed the interlamellar space of OMMT increased from 2. 200 nm to 2. 800 nm, PP/PA6 intercalated into the silicate layers and expanded the interlamellar space, the addition of 4% （mass fraction） of MMT not only increased the tensile strength by 15%, but also the thermal property was remarkably improved.