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Flame retardation of glass‐fiber‐reinforced polyamide 6 by combination of aluminum phenylphosphinate with melamine pyrophosphate
Author(s) -
Hu Zhi,
Lin GongPeng,
Chen Li,
Wang YuZhong
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1922
Subject(s) - cone calorimeter , melamine , fire retardant , materials science , polyamide , thermogravimetric analysis , thermal decomposition , composite material , pyrophosphate , glass fiber , nuclear chemistry , chemical engineering , pyrolysis , char , organic chemistry , chemistry , engineering , enzyme
The aluminum phenylphosphinate (BPA‐Al) was synthesized and its chemical structure was confirmed by FT‐IR, 1 H NMR, and inductively coupled plasma‐atomic emission spectrometry (ICP‐AES). BPA‐Al was used to prepare a series of flame‐retardant glass‐fiber‐reinforced polyamide 6 (GFPA6) composites together with melamine pyrophosphate (MPyP) and sodium tungstate (ST) via melt compounding. The flame retardancy of the composites was investigated by vertical burning test and cone calorimeter test. The thermal behaviors and decomposition kinetics were investigated by thermogravimetric analysis (TGA). BPA‐Al alone could not improve the flame retardancy of GFPA6 composites, but the combination of BPA‐Al and MPyP resulted in a UL‐94 V‐2 rating, and the addition of a small amount of ST to the flame retardant system could endow the composites a V‐0 rating. The flame retardant systems also resulted in a decrease in PHRR and THR in cone calorimeter test. The analysis of thermal decomposition kinetics showed that the activation energies ( E α ) of the flame‐retardant composites dramatically decreased compared with that of GFPA6. Copyright © 2011 John Wiley & Sons, Ltd.