Study on PP/POE/montmorillonite nanocomposites with high impact toughness

摘要

In this work, the PP block copolymer (PPB) was selected as basic resin, POE as toughening agent, high density polyethylene (HDPE) as assistant toughening agent, and nano-Montmorillonite (nano-MMT) as reinforcement, to prepare PP/POE/MMT nano-composites. Structures and properties of PP/POE binary blends, PP/POE/HDPE and PP/POE/MMT ternary blends were investigated respectively. The results showed that high toughness and better processability can be obtained when POE content was 15～20 wt% in PP/POE blends. The use of HDPE had obvious effect on synergistic toughening, and the toughness of PP/POE/HDPE was the best in comparison to PP/POE and PP/HDPE blends, because "core-shell" morphology was formed. PP/POE/MMT ternary blends containing 3wt% MMT showed better mechanical properties than the corresponding binary PP/MMT blends.