Journal
POLYMER DEGRADATION AND STABILITY
Volume 92, Issue 9, Pages 1700-1707Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2007.06.003
Keywords
poly(methyl methacrylate); montmorillonite; nanocomposite; fire-retardant; biodegradation
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The poly(methyl methacrylate) (PMMA)/montmorillonite (MMT) nanocomposite was prepared by emulsifier-free emulsion technique and its structure and properties were characterized with infra red, X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, and cone calorimetry. The highly exfoliated MMT layers with dimension 1-2 nm in thickness were randomly dispersed in the polymer matrix containing MMT lower than 5% w/v, whereas the intercalated structure was predominant with MMT content higher than 5% w/v. Consequently, the fine dispersion of the MMT and the strong interactions between PMMA and MMT created significant improvement of the thermo-stability and fire retardancy of the nanocomposite. The combustion behavior has been evaluated using oxygen consumption cone calorimetry. In addition, a scheme was proposed to describe fire retardancy of PMMA and MMT as well as the correlation between the interaction and structure in polymer/clay systems. The biodegradability of the nanocomposite fire-retardant was tested for its better commercialization. (C) 2007 Elsevier Ltd. All riahts reserved.
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