Organic modification of montmorillonite with low molecular weight polyethylene glycols and its use in polyurethane nanocomposite foams

Nihal Sarier*, Emel Onder

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

This paper deals with the preparation of organoclays by intercalating poly(ethylene glycol) molecules (PEG) between Na montmorillonite (Na-MMT) layers in a clay-water suspension system. X-ray diffraction (XRD) results of organoclays revealed that galleries of MMT were expanded after their intercalation with three different low molecular weight PEGs, including PEG600, PEG1000 and PEG1500. Thus, the distance of the interlayer spacing of MMT, d = 1.38 nm, was increased to d = 1.72, 1.75 and 1.69 nm, respectively, in the organoclay samples. The results of Fourier transform infrared spectroscopic (FTIR), thermogravimetric (TG) and scanning electron microscopic (SEM) analyses supported the findings of XRD and implied that the clay mineral mainly lost its hydrophilic character and gained organophilic features. The organoclay samples also presented improved thermal stabilities. In addition, polyurethane rigid nanocomposite foams composed of 2% organoclays were synthesized, and the effects of the organoclays on the thermal and mechanical performance of the nanocomposite foams were investigated.

Original languageEnglish
Pages (from-to)113-121
Number of pages9
JournalThermochimica Acta
Volume510
Issue number1-2
DOIs
Publication statusPublished - 20 Oct 2010

Keywords

  • DMA
  • Nanocomposite
  • Organoclay
  • PEG
  • Polyurethane
  • XRD

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