期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 18, 期 40, 页码 4827-4838出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b806531d
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资金
- US Department of Commerce, National Institute of Standards and Technologies [60NANB6D6018]
- Penn State University Agricultural Experiment Station
Alkyl carboxylate-modified layered double hydroxides (LDH) were prepared and used as nanofillers for poly(methyl methacrylate) (PMMA) and polystyrene (PS). The LDH intercalated with long-chain linear alkyl carboxylates (CH(3)(CH(2))(n)COO(-), n = 8, 10, 12, 14, 16, 20) were prepared via anionic exchange of MgAl-nitrate, showing a systematic increase in basal spacing with longer alkyls. MgAl-undecenoate LDH was prepared by co-precipitation. The MgAl-LDHs were melt blended with poly(methyl methacrylate) and bulk polymerized with styrene to form nanocomposites. The dispersion of the MgAl-LDH in the polymers was investigated by transmission electron microscopy and X-ray diffraction. Thermal and fire properties were studied using cone calorimetry and thermogravimetric analysis; the thermal stability of both polymers was enhanced and a very significant reduction in the peak heat release rate was observed for almost all of the poly(methyl methacrylate) composites and a few of the polystyrene composites.
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