Martin, S.C. and Liggat, J.J. and Snape, Colin (2001) In situ NMR investigation into the thermal degradation and stabilisation of PAN. Polymer Degradation and Stability, 74 (3). pp. 407-412. ISSN 0141-3910Full text not available in this repository. (Request a copy from the Strathclyde author)
In situ broadline 1H NMR has been used to assess the low temperature degradation of polyacrylonitrile (PAN) under a variety of atmospheres and temperatures. In combination with conventional analytical techniques (solid state 13C NMR and FTIR), the structural and conformational changes produced in the network have been correlated with its thermal behaviour. Degradation has also been shown to be both temperature and time dependent, irrespective of reaction environment. Moreover, it has been demonstrated why air is the preferred medium for stabilisation in the production of fibre precursors. Enhanced stability and resistance to char formation is observed in the air-modified polymer, which also becomes resistant to resoftening during low temperature carbonisation.
|Keywords:||PAN, Fibres, Degradation, Thermo-oxidation, Stabilisation, NMR, Chemistry, Materials Chemistry, Polymers and Plastics, Mechanics of Materials, Condensed Matter Physics|
|Subjects:||Science > Chemistry|
|Department:||Faculty of Science > Pure and Applied Chemistry|
|Depositing user:||Mr Derek Boyle|
|Date Deposited:||07 Mar 2006|
|Last modified:||06 Jan 2017 03:08|