LAUSR

It has been widely reported that the phase structure plays a significant role in determining the properties of polymer blends. In order to obtain conductive composites with lower filler loading, polypropylene (PP)/polyamide 6 (PA6) composites (70/30 by weight) filled with carbon black (CB) have been prepared in accordance with the concept of double percolation. The better interfacial adhesion between CB and PA6 forced the CB particles to selectively locate in PA6 domains. With the increasing amount of CB content, a sea-island structure converted to a co-continuous morphology can be observed through scanning electron microscopy (SEM) results. The increase content and self-coagulation ability of CB may contribute to evolution and establishment of the structure. Meanwhile, rheological properties of the PP/PA6/CB blends were simultaneously investigated to basically understand the relationship between microstructure and electrical properties of the conductive polymer composites (CPCs). This paper discussed the effort of self-networking ability of CB in commanding the morphology transition and conductive mechanism of PP/PA6/CB composites theoretically, providing a guide for fabricating an antistatic or conductive material with superior comprehensive performance.