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Cyanogen isocyanate (NC-NCO) revisited: Thermal and chemical reactivity of a hydrogen-free precursor to C-N-(O) polymers

Journal of Materials Chemistry, ISSN: 0959-9428, Vol: 20, Issue: 1, Page: 110-116
2010
  • 10
    Citations
  • 0
    Usage
  • 11
    Captures
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    Mentions
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    10
    • Citation Indexes
      10
  • Captures
    11

Article Description

The first inorganic polyisocyanate, (NC-NCO), has been prepared and investigated. By polyaddition (polymerisation) of the reactive monomer cyanogen isocyanate (NC-NCO) at low temperatures, the moisture-sensitive polymer was obtained as a phase pure solid. Using several analytical techniques (UV, IR, NMR, MS, DSC, TGA), the formation and the principal connectivity patterns of the hydrogen-free amorphous inorganic network have been settled. From the experimental results, a close structural relation to the organic "nylons" was deduced. Upon thermal impact, this inorganic macromolecule behaves like a typical thermosetting material. Exposing polymeric CNO to a temperature between 400 and 500 °C leads to quantitative removal of oxygen in the form of CO. Depolymerisation and fragmentation at higher temperatures resulted in a virtually complete mass loss due to release of gaseous species. Some preliminary results concerning the high-pressure transformation towards a crystalline "CN O" (carbon oxynitride) are also given. © 2010 The Royal Society of Chemistry.

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