Investigating the ageing behavior of polysiloxane nanocomposites by degradative thermal analysis

J.P. Lewicki, J.J. Liggat, R.A. Pethrick, M. Patel, I. Rhoney

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The ageing behavior of novel polysiloxane nanocomposite elastomers is reported. A series of model polysiloxane nanocomposites has been prepared incorporating the montmorillonite nanoclay Cloisite 6A. The nanoclay dispersion has been characterized with X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). TGA has been utilized to study the effects of ageing on the non-oxidative stability of the nanocomposite systems. The complex evolution of volatiles that occurs during ageing has been studied using Sub-Ambient Thermal Volatilization Analysis (SATVA). Results indicate that significant chemical changes take place within the nanocomposites upon ageing; acid catalyzed hydrolysis, chain backbiting and recombination reactions are re-structuring the polymer-filler network into a more thermodynamically stable form.
Original languageEnglish
Pages (from-to)158-168
Number of pages11
JournalPolymer Degradation and Stability
Volume93
Issue number1
DOIs
Publication statusPublished - Jan 2008

Fingerprint

Siloxanes
polysiloxanes
Silicones
Thermoanalysis
Nanocomposites
nanocomposites
thermal analysis
Aging of materials
Elastomers
Bentonite
recombination reactions
vaporizing
elastomers
montmorillonite
Clay minerals
Vaporization
fillers
hydrolysis
Fillers
Hydrolysis

Keywords

  • clay nanocomposite
  • ageing
  • thermal degradation
  • polysiloxane

Cite this

Lewicki, J.P. ; Liggat, J.J. ; Pethrick, R.A. ; Patel, M. ; Rhoney, I. / Investigating the ageing behavior of polysiloxane nanocomposites by degradative thermal analysis. In: Polymer Degradation and Stability. 2008 ; Vol. 93, No. 1. pp. 158-168.
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Investigating the ageing behavior of polysiloxane nanocomposites by degradative thermal analysis. / Lewicki, J.P.; Liggat, J.J.; Pethrick, R.A.; Patel, M.; Rhoney, I.

In: Polymer Degradation and Stability, Vol. 93, No. 1, 01.2008, p. 158-168.

Research output: Contribution to journalArticle

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AU - Liggat, J.J.

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AU - Rhoney, I.

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AB - The ageing behavior of novel polysiloxane nanocomposite elastomers is reported. A series of model polysiloxane nanocomposites has been prepared incorporating the montmorillonite nanoclay Cloisite 6A. The nanoclay dispersion has been characterized with X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). TGA has been utilized to study the effects of ageing on the non-oxidative stability of the nanocomposite systems. The complex evolution of volatiles that occurs during ageing has been studied using Sub-Ambient Thermal Volatilization Analysis (SATVA). Results indicate that significant chemical changes take place within the nanocomposites upon ageing; acid catalyzed hydrolysis, chain backbiting and recombination reactions are re-structuring the polymer-filler network into a more thermodynamically stable form.

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KW - ageing

KW - thermal degradation

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