Abstract: 2-carboxy-, 2-nitro-, 2, 4-dinitro diphenylamine-4-diazonium salts and the corresponding diazoresins were prepared from polycondensation of diazonuium salt with formaldehyde or 4, 4-bis(methoxymethylene)diphenyl ether. The photolytic and thermolytic properties of the diazonium salts and diazoresins were also investigated. The results show that the substitution groups attached on molecule of diazonium salt have only minor influence on photolysis but have remarkable effect on thermolysis of the diazonium salts as well as diazoresins.

Key words: substitution diazonium salt, diazoresin, thermolysis