Journal
POLYMER DEGRADATION AND STABILITY
Volume 94, Issue 7, Pages 1110-1118Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2009.03.022
Keywords
Nanocomposites; Layered double hydroxides; PMMA; Fire retardancy
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Copolymer nanocomposites were prepared by suspension copolymerization of bis[2-(methacryloyloxy)ethyl] phosphate and methyl methacrylate, together with bis(2-ethylhexyl) phosphate layered double hydroxide and a montmorillonite, Cloisite 93A. X-ray diffraction and transmission electron microscopy were used to characterize the morphology of nanocomposites and the dispersion of additives in the polymer. The thermal stability of the nanocomposites has been assessed by thermogravimetric analysis and cone calorimetry has been used to study the fire properties. Bis[2-(methacryloyloxy)ethyl] phosphate not only copolymerized with MMA, but also aids in the dispersion of additives in PMMA. The copolymer nanocomposites have better dispersion and higher degradation temperature and more char mass than the corresponding PMMA nanocomposites. The largest peak reduction in the heat release rate of the copolymer nanocomposites are 52 and 65% for LDH and MMT additives, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
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