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Polypropylene/montmorillonite (PP/MMT)nanocomposites were prepared by in-situ polymerization using aMMT/MgCl_2/TiCl_4-EB Ziegler-Natta catalyst activated by triethylaluminum(TEA). The enlarged layer spacing of MMT wasconfirmed by X-ray wide angle diffraction (WAXD), demonstrating that MMT were intercalated by the catalyst components.X-ray photoelectron spectrometry (XPS) analysis proved that TiCl_4 was mainly supported on MgCl_2 instead of on the surfaceof MMT The exfoliated structure of MMT layers in the PP matrix of PP/MMT composites was demonstrated by WAXDpatterns and transmission electron microscopy (TEM) observation. The higher glass transition temperature and higher storage modulus of the PP/MMT composites in comparison with pure PP were revealed by dynamic mechanical analysis (DMA).
Polypropylene / montmorillonite (PP / MMT) nanocomposites were prepared by in-situ polymerization using aMMT / MgCl 2 / TiCl 4-EB Ziegler-Natta catalyst activated by triethylaluminum (TEA). The enlarged layer spacing of MMT wasconfirmed by X-ray wide angle diffraction WAXD) demonstrating that MMT were intercalated by the catalyst components. X-ray photoelectron spectrometry (XPS) analysis demonstrated that TiCl 4 was mainly supported on MgCl 2 instead of on the surface of MMT The exfoliated structure of MMT layers in the PP matrix of PP / MMT composites was demonstrated by WAXD patterns and transmission electron microscopy (TEM) observation. The higher glass transition temperature and higher storage modulus of the PP / MMT composites in comparison with pure PP were revealed by dynamic mechanical analysis (DMA).