Preparation and properties of polypropylene filled with organo-montmorillonite nanocomposites
writer：Wang WY, Zeng XF, Wang GQ, Chen JF
keywords：PP; Org-MMT; nanocomposites; intercalated; thermal stability; crystallinity
source：期刊
specific source：JOURNAL OF APPLIED POLYMER SCIENCE
Issue time：2006年
Organo-Montmorillonite (Org-MMT)/maleic anhydride grafted polypropylene (PP-g-MAH)/ polypropylene nanocomposites have been prepared by melt blending with twin-screw extruder. The mechanical properties of the nanocomposites and the dispersion of Org-MMT intercalated by the macromolecular chain were investigated by transmission electron microscopy and mechanical tests. The crystal properties of the nanocomposites have been tested by a differential scanning calorimeter. The thermal properties of the nanocomposites were investigated by thermo gravimetric analysis. The results show that not only the impact property but also the tensile property and the bending modulus of the system have been increased evidently by the added Org-MMT. The Org-MMT has been dispersed in the matrix in the nanometer scale. With the addition of the Org-MMT, the melting point and the crystailing point of the nanocomposites increased; the total velocity of crystallization of the nanocomposites also increased. Thermal stability of the nanocomposites is increased by the filled Org-MMT.