Ultrasonic Oscillations Induced Morphology And Property Development Of Polypropylene Nanocomposites

The melt preparation of polymer nanocomposite is a more versatile approach to make polymer nanocomposites, which has been most widely investigated in recent years. The formation mechanism of polymer nanocomposites is the key to the development of nanocomposite. In melt preparation, the biggest difficulty is to disperse nano particles, especially in polyolefin matrix. It is found that the dispersion of nano particles in polymer matrix not only is related to chemistry modification, compatibilizer, but also depends on processing condition.In this work, based on nano calcium carbonate (n-CaC03), nano montmorillonite (OMMT) and nano attapulgite (OATP), polypropylene (PP) nanocomposites were prepared via ultrasonically assisted extrusion, and the objective of present study was to investigate the effects of ultrasonic oscillations in processing on the morphology and property development of nanocomposites. The key works and conclusions were listed as follows:(1) According to SEM, the nano particles were evenly and finely dispersed in the ultrasonicated nanocomposite via ultrasonic oscillations, and the aggregation size of clay particles was less than 100nm, which is less than that in conventional nanocomposite (without ultrasonic treatment).