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Synthesis and characterization of N ‐methyl‐2,6‐dinitrodiphenylamine‐4‐diazonium salt and its diazoresin
Author(s) -
Wang Jianguo,
Zou Yingquan
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38079
Subject(s) - diphenylamine , thermostability , photosensitivity , salt (chemistry) , materials science , mercury (programming language) , nuclear chemistry , polymer chemistry , irradiation , chemistry , organic chemistry , optoelectronics , computer science , physics , nuclear physics , programming language , enzyme
A new photosensitive agent, dinitro derivatives of diphenylamine diazonium salt ( N ‐methyl‐2,6‐dinitrodiphenylamine‐4‐diazonium salt, MDNDDS), and its diazoresin were synthesized. Their photoreactivities and thermostabilities were investigated. Our results revealed that MDNDDS and MDNDDS‐resin exhibited greatly improved thermostability both in solid state and in coating film comparing with the conventional unsubstituted and mononitro substituted diphenylamine diazonium salts (DDS and MNDDS, respectively) and their diazoresins. The photosensitivity of MDNDDS was found to be slightly lower than DDS but still comparable with MNDDS. As a result of its improved thermostability, both MDNDDS‐resin as a photosensitive agent and lithographic printing plate prepared by MDNDDS‐resin will have a long shelf‐life, which is very important to reduce waste and factory running‐cost. MDNDDS also has a maximum absorption wavelength ( λ max ) at 425 nm, which means that an iodine gallium lamp (main emission wavelength λ em = 420 nm), is better than conventional mercury lamp ( λ em = 360 nm), to be used as the irradiation source in the photoimaging process. Compared with the mercury lamp, iodine gallium lamp is cheaper and greener. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013