PREPARATION OF DIPHENYLAMINE-4-DIAZOSULFONATES,DIAZOSULFONATE RESINS,AND THEIR PHOTOCHEMICAL,THERMAL DECOMPOSITION

doi:10.7517/j.issn.1674-0475.2003.01.30

Abstract

Abstract: Four diphenylamine-4-diazosulfonates:DSS,MDSS,DRS,NDRS derived from diphenylamine-4-diazonium salt(DS),3-methoxy diphenylamine-4-diazonium salt(MDS),diazoresin(DR)and nitro substituted diazoresin(NDR) were prepared via the reactions of Na₂SO₃ and corresponding diazonium salts or diazoresins.The photochemical and thermal decomposition of these compounds in aqueous solution or in solid film(or in coating)have been investigated and confirmed that the photochemical decomposition of this kind of diazosulfonates is rather fast and the thermal stability is much better than the corresponding diazonium salts and diazoresins.Among them the NDRS exhibits the best thermal stability with almost no considerable decomposition both in aqueous solution heated for 6 h at 70 ℃ and in solid film heated for 11 days at 100 ℃.A mechanism of the photo as well as the thermal decomposition for this kind of diazosulfonates has been proposed tentatively.

Key words: diphenylamine-4-diazonium salt, diazoresin, diphenylamine-4-diazosulfonate, diazosulfonate resin, thermal stability

CLC Number:

TQ57

LUO Hao, CAO Wei-xiao. PREPARATION OF DIPHENYLAMINE-4-DIAZOSULFONATES,DIAZOSULFONATE RESINS,AND THEIR PHOTOCHEMICAL,THERMAL DECOMPOSITION[J]. Imaging Science and Photochemistry, 2003, 21(1): 30-38.

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