The modification of the polarity and adhesive properties of linear low-density polyethylene, low-density polyethylene, and isotactic polypropylene through blending with paraffin wax (Fischer-Tropsch synthesis), grafted by maleic anhydride, was investigated. Maleic anhydride grafted paraffin wax significantly increased the polar component of the total surface free energy of polyolefins. Modified polyolefins also had significantly higher adhesion to the polar substrate, a crosslinked, epoxy-based resin. The conservation of the good mechanical properties of the blends was observed up to 10 wt % wax, except for isotactic polypropylene blends, for which there was a reduction in the stress and strain at break at wax concentrations higher than 5%. (c) 2006 Wiley Periodicals, Inc.
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