Effect of MgAl-layered double hydroxide exchanged with linear alkyl carboxylates on fire-retardancy of PMMA and PS

Calistor Nyambo, Ponusa Songtipya, E. Manias, Maria M. Jimenez-Gasco, Charles A. Wilkie

Research output: Contribution to journalArticle

181 Scopus citations

Abstract

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(CH2)nCOO-, 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.

Original languageEnglish (US)
Pages (from-to)4827-4838
Number of pages12
JournalJournal of Materials Chemistry
Volume18
Issue number40
DOIs
StatePublished - Oct 14 2008

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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