Formation Mechanism of Hybrid Shish Kebab and Its Reinforcing Effects on Polypropylene

摘要

This paper presented a simple and facile method to prepare high-performance polypropylene sheet through hybrid shish kebab crystals. The experimental results showed that fibrous rare earth nucleating agent (WBG) was a kind of rigid particle with properties of easier alignment along flow and more stability when compared with oriented molecule, so during the processing of WBG-modified polypropylene samples, WBG fibrils acted as "shish" to direct the oriented crystallization of coiled polymer chains perpendicular to the fibril, into hybrid shish kebab with reinforcement function. As a result, the tensile and yield strengths of WBG-modified polypropylene sheets were improved significantly.