FTIR studies of conformational disorder: crystal perfecting in long chain n-alkanes

GORCE, J. P. and SPELLS, S. J. (2004). FTIR studies of conformational disorder: crystal perfecting in long chain n-alkanes. Polymer, 45 (10), 3297-3303.

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Link to published version:: https://doi.org/10.1016/j.polymer.2004.03.034
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    Abstract

    The low temperature FTIR spectra of long chain n-alkanes C198H398 and C246H494, crystallised from solution in both extended and once-folded forms, have been investigated in the CH2 wagging region. Successive annealing and cooling stages result in a significant reduction in the number of non-planar C–C bond conformers in all cases. This is evidence of a ‘perfecting’ process within the crystals. The time dependence of this behaviour shows that, on raising the annealing temperature, the level of disorder reaches a maximum before declining. In addition, in a continuous heating run on once-folded C198H398, all types of conformational disorder except end-gauche bonds are shown to pass through a maximum near 118 °C, in the region of the transformation to extended chain crystals

    Item Type: Article
    Additional Information: Copyright © 2004 Elsevier Ltd.
    Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre > Polymers, Composites and Spectroscopy Group
    Identification Number: https://doi.org/10.1016/j.polymer.2004.03.034
    Page Range: 3297-3303
    Depositing User: Ann Betterton
    Date Deposited: 09 Aug 2007
    Last Modified: 19 Mar 2021 01:00
    URI: http://shura.shu.ac.uk/id/eprint/951

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