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Metal‐coordinated epoxy polymers with suppressed combustibility. Preparation technology, thermal degradation, and combustibility test of new epoxy‐amine polymers containing the curing agent with chelated copper( II ) carbonate
Author(s) -
Lavrenyuk Helen,
Kochubei Victoria,
Mykhalichko Oleg,
Mykhalichko Borys
Publication year - 2018
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.2489
Subject(s) - diglycidyl ether , epoxy , diethylenetriamine , materials science , thermogravimetric analysis , combustibility , triethylenetetramine , curing (chemistry) , fire retardant , polymer , cone calorimeter , polymer chemistry , combustion , composite material , bisphenol a , chemistry , organic chemistry , char
Summary The diethylenetriamine chelate complex of copper(II) carbonate— DETA ‐CuCO 3 (a fire retardant hardener of epoxy resins)—and the CuCO 3 ‐containing epoxy‐amine polymers— DGEBA / DETA ‐CuCO 3 (6), DGEBA / DETA ‐CuCO 3 (12), DGEBA / DETA ‐CuCO 3 (40), and DGEBA / DETA ‐CuCO 3 (80) with suppressed combustibility—have been obtained in the DETA ‐ DGEBA ‐CuCO 3 system ( DETA and DGEBA are diethylenetriamine and bisphenol A diglycidyl ether, respectively). The DETA ‐CuCO 3 chelate complex was characterized by X‐ray powder diffraction, infrared spectra, and thermal analysis. The thermal gravimetric analysis results have revealed that thermal destruction of DETA ‐CuCO 3 was finished at 400°С, and the maximal temperature of the combustion gases amounted to 520°С. The thermal behavior and combustibility of the CuCO 3 ‐containing epoxy‐amine polymers were studied using thermal analysis and “Ceramic tube” (CT) method. Thermal gravimetric analysis confirms that incorporation of the DETA ‐CuCO 3 into DGEBA appreciably heightens the thermal stability and antiflammability of the CuCO 3 ‐containing epoxy‐amine polymers. Results of CT measurement reveal that maximal temperature of the combustion gases under burning of the DGEBA / DETA ‐CuCO 3 (12) sample in comparison with unmodified epoxy‐amine polymer ( DGEBA / DETA ) is lowered on 219°С and the loss of weight is decreased on 20.5 wt%. According to ASTM 635‐14, ASTM D2863‐13, and ASTM D1929‐16, the flame propagation rate, limiting oxygen index, and temperatures of ignition and self‐ignition have been measured for the elaborated polymer samples.