The thermal degradation behaviour of polydimethylsiloxane/montmorillonite nanocomposites

J.P. Lewicki, J.J. Liggat, M. Patel

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

A series of novel polydimethylsiloxane/montmorillonite (PDMS/MMT) nanocomposites was prepared. The thermal degradation behaviour of these nanocomposites was studied by means of Thermal Volatilization Analysis (TVA) and Thermogravimetric Analysis (TGA). The major degradation products were identified as cyclic oligomeric siloxanes from D3 to D7, and higher oligomeric siloxane residues. Other minor degradation products include methane, bis-pentamethylcyclotrisiloxane, propene, propanal, benzene and dimethylsilanone. The results demonstrate that the nanoclay significantly alters the degradation behaviour of the PDMS network, modifying the profile of the thermal degradation and reducing the overall rate of volatiles evolution. The results also indicate that the nanoclay promotes the formation of dimethylsilanone and benzene by inducing low levels of radical chain scission.
LanguageEnglish
Pages1548-1557
Number of pages9
JournalPolymer Degradation and Stability
Volume94
Issue number9
DOIs
Publication statusPublished - Sep 2009

Fingerprint

Bentonite
thermal degradation
Polydimethylsiloxane
montmorillonite
Clay minerals
Siloxanes
Nanocomposites
nanocomposites
Pyrolysis
siloxanes
degradation
Benzene
Degradation
benzene
vaporizing
Methane
products
Vaporization
Propylene
Thermogravimetric analysis

Keywords

  • poly(dimethylsiloxane)
  • nanocomposite
  • thermal degradation
  • montmorillonite

Cite this

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abstract = "A series of novel polydimethylsiloxane/montmorillonite (PDMS/MMT) nanocomposites was prepared. The thermal degradation behaviour of these nanocomposites was studied by means of Thermal Volatilization Analysis (TVA) and Thermogravimetric Analysis (TGA). The major degradation products were identified as cyclic oligomeric siloxanes from D3 to D7, and higher oligomeric siloxane residues. Other minor degradation products include methane, bis-pentamethylcyclotrisiloxane, propene, propanal, benzene and dimethylsilanone. The results demonstrate that the nanoclay significantly alters the degradation behaviour of the PDMS network, modifying the profile of the thermal degradation and reducing the overall rate of volatiles evolution. The results also indicate that the nanoclay promotes the formation of dimethylsilanone and benzene by inducing low levels of radical chain scission.",
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The thermal degradation behaviour of polydimethylsiloxane/montmorillonite nanocomposites. / Lewicki, J.P.; Liggat, J.J.; Patel, M.

In: Polymer Degradation and Stability, Vol. 94, No. 9, 09.2009, p. 1548-1557.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The thermal degradation behaviour of polydimethylsiloxane/montmorillonite nanocomposites

AU - Lewicki, J.P.

AU - Liggat, J.J.

AU - Patel, M.

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AB - A series of novel polydimethylsiloxane/montmorillonite (PDMS/MMT) nanocomposites was prepared. The thermal degradation behaviour of these nanocomposites was studied by means of Thermal Volatilization Analysis (TVA) and Thermogravimetric Analysis (TGA). The major degradation products were identified as cyclic oligomeric siloxanes from D3 to D7, and higher oligomeric siloxane residues. Other minor degradation products include methane, bis-pentamethylcyclotrisiloxane, propene, propanal, benzene and dimethylsilanone. The results demonstrate that the nanoclay significantly alters the degradation behaviour of the PDMS network, modifying the profile of the thermal degradation and reducing the overall rate of volatiles evolution. The results also indicate that the nanoclay promotes the formation of dimethylsilanone and benzene by inducing low levels of radical chain scission.

KW - poly(dimethylsiloxane)

KW - nanocomposite

KW - thermal degradation

KW - montmorillonite

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