SILYLATION OF ASPHALTS WITHIN GAS-LIQUID CHROMATOGRAPHIC COLUMNS - EFFECTS ON INVERSE GLC DATA AND INFRARED SPECTRA

Silylation of asphalts within inverse gas-liquid chromatographic (IGLC) columns offers a convenient means to study asphalt functionality. This technique was demonstrated to be effective in blocking phenolic and carboxylic acid OH functional groups in asphalts. This was confirmed by infrared spectra of silylated asphalts. It is suggested that these OH groups interact strongly with both phenol and propionic acid in inverse GLC because silylation resulted in decreases in specific interaction coefficients for both test compounds. IGLC data on silylated asphalts indicated that form amide interacts strongly with carbonyl groups in asphalts. © 1969, American Chemical Society. All rights reserved.