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Influence of the surface modification of alumina nanoparticles on the thermal stability and fire reaction of PMMA composites
Author(s) -
Cinausero Nicolas,
Azema Nathalie,
Cochez Marianne,
Ferriol Michel,
Essahli Mohamed,
Ganachaud François,
LopezCuesta JoséMarie
Publication year - 2008
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.1157
Subject(s) - materials science , thermogravimetric analysis , thermal stability , grafting , nanocomposite , chemical engineering , polydimethylsiloxane , nanoparticle , composite material , oxide , covalent bond , flammability , methyl methacrylate , fourier transform infrared spectroscopy , phase (matter) , dichloromethane , polymer chemistry , polymer , solvent , monomer , organic chemistry , nanotechnology , chemistry , engineering , metallurgy
Nanometric aluminum oxide particles were modified by phosphonic acid‐based oligomers of aromatic polyester, polyether, or polydimethylsiloxane (PDMS). The grafting process was characterized by FTIR spectroscopy and thermogravimetric analysis (TGA) showing that covalent bonds must have formed between the oxide and oligomers. The highest yield of grafting was achieved in dichloromethane (CH 2 Cl 2 ) solvent. Then, nanocomposites were prepared by melt‐blending in a poly(methyl methacrylate) (PMMA) matrix. The best results in terms of thermal stability and flammability were obtained with the bis‐phosphonicpolydimethylsiloxane‐based formulation. With this latter, the peak of heat released rate (pHRR) decreased during the combustion, whereas PyGC/MS experiments led to the conclusion that PDMS‐covered nanoparticles played a role in the composition of the gaseous phase as well. Copyright © 2008 John Wiley & Sons, Ltd.