Thermal decomposition of polymeric silanes

Marianne Blazsó, R. West, T. Székely

Research output: Contribution to journalArticle

7 Citations (Scopus)


Pyrolysis-gas chromatographic/mass spectrometric investigations are presented on polysilanes with dimethyl, n-alkylmethyl and methylphenyl substituents on the Si atoms and on copolymers of dimethyl- and methylphenylsilanes. Pyrolysis of polymeric silanes at 400° C leads to cyclotetrasilanes and cyclopentasilanes. Above 500° C, a variety of cyclic carbosilanes are formed from poly(dimethylsilylene), and alkene elimination takes place in poly(n-alkylmethylsilylene)s. Those thermal products of poly(methylphenylsilylene) which can be analyzed by gas chromatography are silanes and disilanes. Cyclotetrasilanes and cyclopentasilanes with phenyl substituents were observed by pyrolysis-mass spectrometry. The products formed at 400° C from different copolymers of dimethylsilane and methylphenylsilane units reflect the sequence distribution along the copolymeric chain.

Original languageEnglish
Pages (from-to)175-185
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Issue numberC
Publication statusPublished - Mar 1989


  • Copolymers
  • gas chromatography
  • mass spectrometry
  • polymers
  • polysilanes
  • pyrolysis.

ASJC Scopus subject areas

  • Analytical Chemistry
  • Fuel Technology

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