期刊
POLYMERS FOR ADVANCED TECHNOLOGIES
卷 22, 期 12, 页码 2480-2487出版社
WILEY-BLACKWELL
DOI: 10.1002/pat.1788
关键词
epoxy resins; flame retardancy; thermal degradation; triazine
资金
- Program for Specialized Research Fund for the Doctoral Program of Higher Education [200803580008]
- Program for Science and Technology of Suzhou [SG-0841]
- State Key Laboratory of Environmental Adaptability for Industrial Product
- University of Science and Technology of China
A triazine ring-containing charring agent (PEPATA) was synthesized via the reaction between 2,6,7-trioxa-l-phosphabicyclo-[2.2.2]octane-4-methanol (PEPA) and cyanuric chloride. It was applied into intumescent flame retardant epoxy resins (IFR-EP) as a charring agent. The effect of PEPATA on fire retardancy and thermal degradation behavior of IFR-EP system was investigated by limited oxygen index (LOI), UL-94 test, microscale combustion calorimetry (MCC), thermogravimetric analysis (TGA) and thermogravimetric analysis/infrared spectrometry (TG-IR). The glass transition temperatures (T(g)) of IFR-EP systems were studied by dynamic mechanical analysis (DMA). The LOI values increased from 21.5 for neat epoxy resins (EPs) to 34.0 for IFR-EP, demonstrating improved flame retardancy. The TGA curves showed that the amount of residue of IFR-EP system was largely increased compared to that of neat EP at 700 degrees C. The new IFR-EP system could apparently reduce the amount of decomposing products at higher temperatures and promotes the formation of carbonaceous charred layers that slowed down the degradation. Copyright (C) 2010 John Wiley & Sons, Ltd.
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