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Thermo-oxidative effects on the surface energy of polypropylene were measured by inverse gas chromatography as a function of exposure time and temperature. Unaltered polypropylene had a surface energy of 33mJ/m 2 . Oxidized polypropylene, after exposure to air at temperatures of 100°C and 110°C, had a range of maximum surface energies from 38 to 41mJ/m 2 . Comparisons between FTIR...