Polypropylene (PP) grafted with maleic anhydride (denoted as PP-g-MA), was successfully demonstrated with new functions, i.e., to serve as polymeric surfactant for preparing multifunctional polyolefin nanocomposites. First, magnetic nanocomposites containing stabilized iron oxide/cobalt colloidal nanoparticles (NPs) were synthesized through a facile one-pot bottom up method, i.e., thermal decomposing organometallic precursor, Fe(CO)5/Co2(CO)8in refluxing PP-g-MA/solvent, or PP/PP-g-MA/solvent system. PP-g-MA with different molecular weights and/or concentrations has shown its unique capability to control the morphology, crystalline phase (a- vs. ?- phase for iron oxide NPs; and e- vs. �- phase for cobalt NPs,) and magnetic property of these synthesized magnetic colloidal NPs. Second, PP nanocomposites reinforced with PP-g-MA stabilized carbon nanotubes (CNTs) were prepared through an ex-situsolution blending approach. The dispersion quality and stability of surface functionalized CNTs-PP colloids in organic solvent can be improved through the aid of PP-g-MA. In addition, the physicochemical properties including thermal stability, flame retardancy and thermo-mechanical property of the resulted PP/CNTs nanocomposites were significantly enhanced.  The formation mechanisms in the first cases and the enhanced mechanisms in the latter will be discussed as well.

New functions of polypropylene (PP) grafted with maleic anhydride toward multifunctional polypolefin nanocomposites

246th National Meeting (2013)

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