Thermal degradation of organophosphorus flame-retardant poly(methyl methacrylate) nanocomposites containing nanoclay and carbon nanotubes

Filler nanoparticles pave the way for the development of novel halogen-free flame-retardant polymers. The aim of this study was to investigate the thermal degradability, and in particular, the thermal degradation mechanism of organophosphorus flame-retardant poly(methyl methacrylate) (PMMA) nanocomp...

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Bibliographic Details
Published in:Polymer degradation and stability 2012-03, Vol.97 (3), p.273-280
Main Authors: Orhan, Tugba, Isitman, Nihat Ali, Hacaloglu, Jale, Kaynak, Cevdet
Format: Article
Language:English
Subjects:
Applied sciences
Carbon nanotube
Carbon nanotubes
Degradation
Direct pyrolysis mass spectrometry
Exact sciences and technology
mass spectrometry
Melamine
nanoclays
Nanocomposite
Nanocomposites
Nanomaterials
nanoparticles
Nanostructure
Numerical control
Organoclay
Organophosphorus compound
Physicochemistry of polymers
Polymer industry, paints, wood
Polymethyl methacrylates
polymethylmethacrylate
pyrolysis
Technology of polymers
temperature
Thermal degradation
thermogravimetry
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Summary:Filler nanoparticles pave the way for the development of novel halogen-free flame-retardant polymers. The aim of this study was to investigate the thermal degradability, and in particular, the thermal degradation mechanism of organophosphorus flame-retardant poly(methyl methacrylate) (PMMA) nanocomposites containing nanoclay (NC) and multi-walled carbon nanotubes (CNT). For this purpose, thermogravimetry and direct pyrolysis mass spectrometry analysis were utilized. The onset of degradation was delayed through increased maximum degradation temperature and suppressed mass loss corresponding to initial degradation stage with carbon nanotubes and nanoclays, respectively. Possibility of reactions of melamine and/or melamine derivatives and interactions between carbonyl groups of PMMA and phosphinic acid leading to thermally more stable products was increased owing to the barrier effect of filler nanoparticles. In the presence of NC better flame retarding characteristics was detected as anhydride formation, leading to charring being more effective.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2011.12.020