POLYPROPYLENE/Sn-Pb ALLOY NANOCOMPOSITES
(1.Institute of Materials Science and Engineering,Wuhan University of Technology, Wuhan 430070, P. R. China；
2.School of Chemistry and Chemical Engineering,Suzhou University, Suzhou 216006, P. R. China)
2.School of Chemistry and Chemical Engineering,Suzhou University, Suzhou 216006, P. R. China)
Abstract: The polypropylene/Sn-Pb (PP/Sn-Pb) nanocomposites were prepared by melt blending PP and Sn-Pb. The factors influencing the morphology of PP/Sn-Pb nanocomposites were studied by SEM. The structure of PP crystalline in PP/Sn-Pb composites was measured by wide angle X-ray diffraction(WAXD). The processibility, volume resistivity, viscoelasticity and toughness of PP/Sn-Pb nanocomposites were discussed. The results show that Sn-Pb can improve notably the processibility of PP. It is found that there exist β-crystal of PP in PP/Sn-Pb composite. The amount of the β-crystal is related to the volume fraction φ and particle demensiond of Sn-Pb. It is also found that the electrically critical volume fraction φc of Sn-Pb decreases notably with the decrease ofd. The complex tensile moduli of PP/Sn-Pb composites increase with the increase of φ and the decrease of d. The tensile toughness of PP/Sn-Pb nanocomposites is ten times as high as PP and the izod impact toughness is 2.8 times as high as PP.
Key words: polypropylene Sn-Pb nanocomposites