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Characterisation of polysilanes by thermal analysis methods

  • Cements, Glasses, Ceramics
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Abstract

Polysilanes have been synthesised as potential precursors for silicon carbide fibres. One critical property of these precursors is the ceramic yield obtained on pyrolysis. This is determined by TG and typical curves are shown. A second important property is the suitability for spinning a fine, flexible fibre. The characterisation of ‘spinnability’ is subjective but one of the aims of this work has been to define more precisely the temperature at which to attempt spinning. This has involved the use of TMA and DSC.

Zusammenfassung

Polysilane wurden als potentielle Präkursoren für Siliziumkarbidfasem synthetisiert. Ein kritisches Merkmal dieser Präkursoren ist die Keramikausbeute bei der Pyrolyse. Dies wird mittels TG ermittelt und typische Kurvenverläufe sind angeführt. Die zweite wichtige Eigenschaft ist die Eignung zum Spinnen einer feinen, flexiblen Faser. Die Eigenschaft “Spinnbarkeit” ist subjektiv und eine der Zielsetzungen dieser Arbeit bestand in einer präziseren Definition der Temperatur, bei der das Spinnen versucht wird. Dabei werden TMA und DSC eingesetzt.

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Bushnell-Watson, S.M., Sharp, J.H. Characterisation of polysilanes by thermal analysis methods. Journal of Thermal Analysis 40, 189–199 (1993). https://doi.org/10.1007/BF02546569

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