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Effect of aminobisphosphonated copolymer on the thermal stability and flammability of poly(methyl methacrylate)
Author(s) -
Vahabi Hossein,
Longuet Claire,
Ferry Laurent,
David Ghislain,
Robin JeanJacques,
LopezCuesta JoséMarie
Publication year - 2012
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.3158
Subject(s) - thermogravimetric analysis , materials science , thermal stability , char , methyl methacrylate , flammability , polymer chemistry , chemical engineering , pyrolysis , poly(methyl methacrylate) , fire retardant , copolymer , fourier transform infrared spectroscopy , polymer , composite material , engineering
Methyl methacrylate was copolymerized with propyl N , N ‐tetramethylbis(phosphonate)‐bis(methylene)aminemethyl methacrylate (MAC 3 NP 2 ). The thermal degradation and flammability of this modified poly(methyl methacrylate) (PMMA) were compared with those of pure PMMA using thermogravimetric analysis (TGA) and pyrolysis combustion flow calorimetry (PCFC). The morphology of char was investigated using scanning electron microscopy and the yield of phosphorus using energy‐dispersive X‐ray analysis. The gases evolved during degradation in TGA were analysed using Fourier transform infrared spectroscopy. The total heat release and heat release capacity of the reactively modified PMMA are reduced, as compared to pure PMMA. The modified PMMA presents a better thermal stability (above 290 °C) than pure PMMA and leads to an important char formation. A comparison among TGA, PCFC and the amount of phosphorus in the condensed phase gives useful information about the role of phosphorus in the flame retardancy of the copolymer. The result reveals the effect of phosphorus not only in the condensed phase but also in the vapour phase. Copyright © 2011 Society of Chemical Industry