Abstract: The kinetics of photo-and thermo-decomposition of various diphenylamine diazonium salts in ethanol were investigated. It was found that the diphenylamine-4-diazonium salts studied in this work possess better properties both in photosensitive behavior and in thermostabilities than that of diphenylamine-2-diazonium salt. 3-Methoxy-and 2-sulfonic-diphenylamine-4-diazonium salts exhibit excellent thermostabilities. The carbazole-3-diazonium salt has similar properties towards photo-and thermo-decomposition as compared with that of dephenylamine-2-diazonium salt.

Key words: diphenylamine diazonium salt, the kinetics of photo-and thermo-decomposition, negative presensitized plate