A 119mSn Mössbauer study of tin/molybdenum oxidic systems as flame retardants and smoke suppressants for rigid PVC
| Autor: | Pete Smith, William J. Kroenke, Paul A. Cusack |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Materials science
Polymers and Plastics Inorganic chemistry Oxide chemistry.chemical_element Condensed Matter Physics Combustion Metal chemistry.chemical_compound chemistry Mechanics of Materials Molybdenum Elemental analysis visual_art Materials Chemistry visual_art.visual_art_medium Char Tin Fire retardant Nuclear chemistry |
| Zdroj: | Polymer Degradation and Stability. 14:307-318 |
| ISSN: | 0141-3910 |
| Popis: | Tin(IV) oxide, either alone or in combination with melaminium betaoctamolybdate or molybdenum(VI) oxide, has been found to be an effective flame retardant/smoke suppressant for rigid PVC. 119m Sn Mossbauer spectroscopy has been used to study the chemical changes undergone by the tin species during: (a) thermal degradation and (b) combustion. Under these conditions, the SnO 2 is partially reduced to tin(II) species (SnCl 2 and SnO) and metallic β-Sn. Elemental analysis of the char residues indicates that a proportion of the tin and molybdenum is lost from the polymer (possibly as volatile metallic chlorides or oxychlorides) and it is suggested that these metals can operate as fire retardants in both the condensed and vapour phases. |
| Databáze: | OpenAIRE |
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