Flame retardancy mechanisms of melamine cyanurate in combination with aluminum diethylphosphinate in epoxy resin

ABSTRACT A novel flame‐retardant (FR) epoxy (EP) composite based on melamine cyanurate (MCA) and aluminum diethylphosphinate (AlPi) was successfully prepared and its flame retardancy was systematically investigated. Firstly, the facile surface modification was adopted to effectively solve the aggreg...

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Bibliographic Details
Published in:Journal of applied polymer science 2019-03, Vol.136 (12), p.n/a
Main Authors: Chen, Wenhua, Liu, Pengju, Cheng, Yanbo, Liu, Yuan, Wang, Qi, Duan, Wenfeng
Format: Article
Language:English
Subjects:
Aluminum
aluminum diethylphosphinate
Chemical composition
Combustion
epoxy
Epoxy resins
flame retardancy
Fourier transforms
Gas chromatography
Mass spectrometry
Materials science
Melamine
melamine cyanurate
Organic chemistry
Photoelectrons
Polymers
Pyrolysis
Scanning electron microscopy
Scientific imaging
Synergistic effect
Thermal degradation
Thermogravimetric analysis
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Summary:ABSTRACT A novel flame‐retardant (FR) epoxy (EP) composite based on melamine cyanurate (MCA) and aluminum diethylphosphinate (AlPi) was successfully prepared and its flame retardancy was systematically investigated. Firstly, the facile surface modification was adopted to effectively solve the aggregation of FRs in EP matrix during the curing process. The influence of modified MCA/AlPi on the fire behavior and thermal degradation of EP were studied by using limiting oxygen index (LOI), vertical burning (UL94) tests, thermogravimetric analysis and pyrolysis‐gas chromatography/mass spectrometry (Py‐GC/MS). The experimental results showed that EP/MCA/AlPi composite achieved UL‐94V0 rating and LOI value of 33.0% at the optimum mass fraction of MCA/AlPi of 2/1. The chemical composition and structure of residue were characterized by X‐ray photoelectron spectroscopy, Fourier transform infrared spectrometry and scanning electron microscopy. MCA mainly acted in gaseous phase during the initial combustion stage, and therefore to provide enough time for the formation of carbon layer in condenses phase. As a result, the synergistic effect of MCA and AlPi can effectively promote the formation of the char layer and the FR efficiency. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47223.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47223