Abstract
Nanocomposites were manufactured by using isotactic polypropylene Moplen HP 400R (Albis Plastic Scandinavia AB, Sweden) as a matrix, organically modified montmorillonite nanoclay Delitte 67G (Laviosa Chimica Mineraria S.p.A., Italy) as a filler, and maleic anhydride grafted polypropylene Eastman G 3015 (Eastman Chemical Company, USA) as a compatibilizer. Hybrids were prepared by using a two-step melt mixing process: (i) masterbatches with various clay/compatibilizer proportions were extruded in a twin-screw extruder Brabender PL2000, and (ii) neat polypropylene and the masterbatches were melt mixed at various proportions (corresponding to various concentrations of nanoclay) at molding of dumbbell specimens in injection-molding machine Arburg 320C. Dispersion of clay was examined by means of rheological tests (small-amplitude shear oscillations). The graphs of storage and loss moduli demonstrated strong low-frequency plateaus conventionally associated with good exfoliation of nanofiller.
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