Abstract
Sixteen hydrocarbon waxes of four different types were characterized by high-resolution glass capillary gas chromatography (GC) coupled with a direct vaporizer for solid samples. A furnace-type pyrolyser is used as the vaporizer. Components having very similar structures, such as branched-chain alkanes and the corresponding n-alkanes, were clearly separated using a high-resolution glass capillary column. The resulting GC data were correlated with various physical properties of the waxes, such as melting point, refractive index, degree of needle penetration and specific gravity. Thermogravimetric analysis and other thermal methods were also used to determine the molecular weight distributions and average molecular weights of the waxes.
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