Modification of polypropylene by grafting with polyhedral oligomeric silsesquioxanes cage molecules enhances oxidation resistance, and does not markedly affect its mechanical properties except for ultimate elongation.
Maleic anhydride-grafted polypropylene facilitates the formation of β-type polypropylene, makes it more compatible with titanate-treated calcium carbonate, and increases the toughness of the composites.
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