关键词: 原位接枝插层聚合, 熔融共混, 聚丙烯, 蒙脱土, 纳米复合材料

Abstract: A“two-step” method successfully in preparing polypropylene/montmorillonite nanocomposites (PMN) was introduced.In the first step, most amount of acrylamide (AM) was polymerized in-situ and intercalated into organic-montmorillonite (O-MMT) and at the same time a little amount of AM was grafted on polypropylene macromolecule chains. In the second step, the mother matrix prepared in the first step was blended with polypropylene (PP) to produce the PMN.XRD spectra showed that the montmorillonite in the composites had been exfoliated.SEM indecated absence of clear organic and inorganic phases in PMN. The tensile strength of PMN achieved 42.4MPa, which was increased by 26% against pure PP. The maximum value of toughness strength was 10.5kJ•m^-2, which was increased by 155% against pure PP. The results showed that the mechanical properties of PMN reached a desired level.

Key words: 原位接枝插层聚合, 熔融共混, 聚丙烯, 蒙脱土, 纳米复合材料