Thermogravimetry of dihydroxyviolanthrone esters

Dihydroxyviolanthrone esters of straight chain alkanoic acids contain a thermally stable aromatic system connected by an ester linkage to an aliphatic hydrocarbon moiety. These esters provide excellent models for studying the different pyrolysis behavior of aliphatic and aromatic structures. Using dynamic and isothermal thermogravimetry, the effect of atmosphere on volatilization, the variation of stability with chain length of the alkanoic acid, and the volatilization kinetics have been studied.