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

ORHAN T., Isitman N. A., HACALOĞLU J., KAYNAK C.

POLYMER DEGRADATION AND STABILITY, cilt.97, sa.3, ss.273-280, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 97 Sayı: 3
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.polymdegradstab.2011.12.020
  • Dergi Adı: POLYMER DEGRADATION AND STABILITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.273-280
  • Anahtar Kelimeler: Thermal degradation, Direct pyrolysis mass spectrometry, Organophosphorus compound, Carbon nanotube, Organoclay, Nanocomposite, FLAMMABILITY PROPERTIES, CLAY, FIRE, ORGANOCLAYS, COMBUSTION, DISPERSION, SYNERGISM, MECHANISM, BEHAVIOR
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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. (C) 2012 Elsevier Ltd. All rights reserved.