Infra-red spectrum of the tight (110) fold in n-C198H398

GORCE, J. P. and SPELLS, S. (2001). Infra-red spectrum of the tight (110) fold in n-C198H398. Polymer, 43 (8), 2581-2584.

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The alkane n-C198H398 has been crystallised in both extended chain and once-folded forms and annealed to produce materials with low concentrations of gauche bonds. The concentrations of the specific conformers detected by FTIR spectroscopy at −173 °C are calculated, using measurements on liquid n-hexadecane for calibration: values are all generally less than 2.0 per 100 carbon atoms, with extended chain samples showing values less than 1.0 per 100 carbon atoms. A subtraction spectrum (Once-folded chain sample minus Extended chain sample) shows positive bands at 1298, 1340, 1347 and 1369 cm−1, which are predicted in earlier calculations for a (110) fold, while additional positive bands at 1353 and 1363 cm−1 are assigned, respectively, to gg conformers and (tentatively) to strained gtg or gtg′ conformations.

Item Type: Article
Additional Information: Copyright © 2002 Published by Elsevier Science Ltd
Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Polymers, Composites and Spectroscopy Group
Identification Number:
Page Range: 2581-2584
Depositing User: Ann Betterton
Date Deposited: 16 Aug 2007
Last Modified: 19 Mar 2021 01:00

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