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The effect of different metallic catalysts on the coreaction of cyanate/epoxy
Author(s) -
Li Qi Fang,
Lu Kun,
Yang Qingquan,
Jin Riguang
Publication year - 2006
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.22882
Subject(s) - cyanate ester , epoxy , curing (chemistry) , catalysis , cyanate , polymer chemistry , materials science , isothermal process , fourier transform infrared spectroscopy , triazine , thermosetting polymer , manganese , differential scanning calorimetry , metal , chemical engineering , chemistry , composite material , organic chemistry , metallurgy , physics , thermodynamics , engineering
The curing reaction between the diepoxy and dicyanate mixed resins in the presence of three different catalysts Cu(AcAc) 2 , manganese octoate, and copper octoate was investigated. The thermal behavior was monitored using differential scanning calorimeter; the transformations of structures during the isothermal and heating process were explored by Fourier transform infrared spectroscopy; the changes of the carbonic‐framework of polymer and intermediate products were analyzed by nuclear magnetic resonance. Conclusions can be drawn as follows: Similar to noncatalyzed system, the overall reaction still occurs in two steps: cyclotrimerization of cyanate ester to produce triazine rings, coupled with the formation of some secondary intermediate products, and coreaction of epoxy and triazine rings to form oxazolidinone rings at high temperature. The catalysts can accelerate the curing process and decrease the curing temperature as well as gel time, and manganese octoate presents the best effect on curing rate. But the mechanisms and the structures of intermediate products of metallic‐catalyzed epoxy/cyanate are not changed by the addition of catalysts. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2293–2302, 2006