Identification of dicarboxylic anhydrides in oxidized asphalts.
Petersen-JC; Barbour-FA; Dorrence-SM
Anal Chem 1975 Jan; 47(1):107-111
The report identifies dicarboxylic anhydrides as a significant oxidation product in asphalts and suggests reasons why these were not identified by previous investigators. The anhydrides were identified by selective chemical reactivity and infrared spectroscopy. The carbonyl infrared bands of the anhydrides and their derivatives were made readily observable by the elimination of the interference of the strong ketone band through the use of differential spectroscopy. A model compound study was conducted to determine the most probable structural type of anhydrides in asphalts.
OP; Journal Article