Dimethylsilanone generation from pyrolysis of polysiloxanes filled with nanosized silica and ceria/silica

Kulyk, Kostiantyn, Zettergren, Henning, Gatchell, Michael, Alexander, John D., Borysenko, Mykola, Palianytsia, Borys, Larsson, Mats and Kulik, Tetiana ORCID: https://orcid.org/0000-0002-1740-0348 2016. Dimethylsilanone generation from pyrolysis of polysiloxanes filled with nanosized silica and ceria/silica. ChemPlusChem 81 , pp. 1003-1013. 10.1002/cplu.201600229

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Abstract

Temperature-programmed desorption mass spectrometry (TPD MS) was used to study the pyrolysis of PDMS and its composites with nanosized silica and ceria/silica. The results suggest that the elusive organosilicon compound, dimethylsilanone, is generated from PDMS over a broad temperature range (in some cases starting at 70 °C). The presence of nano-oxides catalyzes this process. Ions characteristic of the fragmentation of dimethylsilanone under electron ionization are assigned with the aid of DFT structure calculations. Possible reaction mechanisms for dimethylsilanone generation are discussed in the context of the calculated kinetic parameters. Observed accompanying products of PDMS pyrolysis, such as tetramethylcyclodisiloxane and hexamethylcyclotrisiloxane, indicate that multiple channels are involved in the dimethylsilanone release.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Chemistry Schools > Physical, Chemical & Environmental Sciences
Publisher:	Wiley
ISSN:	2192-6506
Last Modified:	11 Nov 2026 11:30
URI:	https://orca.cardiff.ac.uk/id/eprint/190848

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