KINETIC STUDY OF THE THERMAL DECOMPOSITION OF SOME AROMATIC ORTHO-CHLORINATED AZOMONOETHERS. 1: DECOMPOSITION OF 4-[(2-CHLOROBENZYL)OXI]-4'-TRIFLOUROMETHYL-AZOBENZENE

摘要

New synthesized aromatic azomonoethers, exhibiting dying properties and liquid crystalline nature, generate interest as materials for non-linear optical applications. The thermal stability of the ortho-chlorinated derivatives, with the general formula: where R is a nematogenic group CF_3, CN, Cl, or a highly polarizable group NO_2, is proposed to be investigated under non-isothermal conditions. In this investigation, the thermal stability and the decomposition kinetics of 4-[(2-chlorobenzyl)oxi]-4'-triflouromethyl-azobenzene were carried out. The activation energy of the first decomposition step was evaluated by means of different multi-heating methods.