【摘要】 通过熔融插层法制备了聚丙烯/蒙脱土(PP/MMT)纳米复合材料。利用X射线衍射(XRD)和透射电镜表征了PP/MMT纳米复合材料的插层结构。XRD结果表明,经过聚乙二醇(PEG)处理的蒙脱土层间距增大;透射电镜(TEM)照片显示,蒙脱土在PP基体中达到纳米级分散,且分散均匀。PP/MMT纳米复合材料力学性能得到较大提高。加入5份改性MMT时,复合材料的缺口冲击强度和断裂伸长率分别从纯PP的3.93kJ/m2、74.46%提高到9.95kJ/m2、220.66%。动态流变性能测试结果表明,MMT的加入降低了PP的复数黏度(η*)、储能模量(G′)和耗能模量(G″)。更多还原

【Abstract】 Polypropylene/montmorillonite (PP/MMT) nanocomposites were prepared by melt intercalation method. The rheological behaviors and mechanical properties of the PP/MMT nanocomposites were studied. The analysis of transmission electron microscopy (TEM) and X-ray diffraction (XRD) indicated that the poly(ethylene glycol) (PEG) modified montmorillonite is intercalated and well disperses into PP matrix. Due to the typical intercalated structures,the mechanical properties of the nanocomposites are improved significantly as compared with virgin PP. The izod-notched impact strength and elongation at break of PP nanocomposites is 1.53 and 1.96 times as high as those of pure PP respectively. With the addition of the modified MMT hybrids,the storage modulus (G’),loss modulus (G″) and complex viscosity (η*) of PP are decreased.更多还原