Comparison dielectric and thermal properties of polyurethane/organoclay nanocomposites

Baysal G., Aydin H., KÖYTEPE S., SEÇKİN T.

THERMOCHIMICA ACTA, cilt.566, ss.305-313, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 566
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.tca.2013.04.036
  • Dergi Adı: THERMOCHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.305-313
  • Anahtar Kelimeler: Polyurethane, Quaternary ammonium salt, Ionic liquid, Organoclay, Nanocomposites, Dielectric properties, MORPHOLOGY, CLAY, POLYMERIZATION, FABRICATION, MEMBRANES, BULK
  • İnönü Üniversitesi Adresli: Evet

Özet

Polyurethane composites were obtained with different organoclay contents. The organoclay Na+-montmorillonite was dispersed in the PU matrix by mixing method from solution. Na+-montmorillonite was modified with dodecyl ammonium sulphate and 1-methyl-3-octyl imidazolium tetrafluoroborate. The nanocomposites obtained by using different modifier were compared in terms of dielectric and thermal properties. The dispersion state of the organoclay particles and its effect on the thermogravimetric and dielectric properties of the composites was investigated. The characterization of PU/organoocl ay composites was carried out by means of scanning electron microscopy, Fourier transform infrared, thermogravimetric analysis and X-ray diffraction. The dielectric properties of the PU/organoclay nanocomposites were studied in detail. The obtained PU/organoclay intercalated nanocomposites exhibited better thermal stability and improved lower dielectric constants than the pure PU. (C) 2013 Elsevier B.V. All rights reserved.