Influence of magadiite dispersion states on the flammability of polystyrene and polyphenylene ether-polystyrene alloy nanocomposites

Hideaki Yukutake, Motoyasu Kobayashi, Hideyuki Otsuka, Atsushi Takahara

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A layered hydrous sodium silicate mineral, magadiite, was uniformly exfoliated into polystyrene (PS) matrices to result in a PS/magadiite nanocomposite with high flame-retardant properties. Surface-initiated radical polymerization of styrene from the magadiite interlayer afforded PS graft chains along with exfoliation of each silicate layer to contribute to a uniform dispersion of inorganic nanosheet. The resulting PS-grafted magadiite (PS-g-magadiite) was then mixed with PS homopolymer by a melt-blending process, forming PS/magadiite nanocomposites with fine dispersion of magadiite, which was confirmed by X-ray diffraction, transmission electron microscopy and dynamic mechanical analysis. A series of PS/magadiite composites with various dispersion states and blending ratios were molded into pressed-film-type test pieces to evaluate their flammabilities by cone calorimetric measurements. A peak heat release rate (PHRR) of well-dispersed PS/magadiite nanocomposites was half of that of the PS homopolymer. The dispersibility of magadiite was found to be a crucial factor for improving flammabilities for PS/magadiite composites. Polyphenylene ether-PS/magadiite nanocomposites were also prepared in a similar manner using the PS-g-magadiite nanosheet, but they could not suppress higher PHRR.

Original languageEnglish
Pages (from-to)223-231
Number of pages9
JournalPolymer Journal
Volume42
Issue number3
DOIs
Publication statusPublished - Mar 1 2010

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Polystyrenes
Flammability
Ether
Ethers
Nanocomposites
Nanosheets
Homopolymerization
polyphenylene sulfide
Flame Retardants
Silicate minerals
Silicates
Styrene
Composite materials
Dynamic mechanical analysis
Flame retardants
Free radical polymerization
Grafts
Cones
Sodium
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Influence of magadiite dispersion states on the flammability of polystyrene and polyphenylene ether-polystyrene alloy nanocomposites. / Yukutake, Hideaki; Kobayashi, Motoyasu; Otsuka, Hideyuki; Takahara, Atsushi.

In: Polymer Journal, Vol. 42, No. 3, 01.03.2010, p. 223-231.

Research output: Contribution to journalArticle

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