The application of mixed-crystal IR spectroscopy to molecular deformation in polyethylene by rolling

OKOROAFOR, E. U. and SPELLS, S. J. (1994). The application of mixed-crystal IR spectroscopy to molecular deformation in polyethylene by rolling. Polymer, 35 (21), 4578-4589.

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Abstract

The mixed crystal i.r. technique has been applied to polyethylene single crystal mats after rolling at room temperature to roll ratios up to 6.0. Reduction in the absorbance of the outer CD2 bending components provides evidence of lamellar breakup. Model calculations indicate that the size of blocks which break away from the crystals is reduced to approximately 36 angstrom for a ratio of 6, while X-ray diffraction data show that crystallite reorientation occurs progressively with increasing roll ratio. Changes in small-angle X-ray scattering and the Raman longitudinal acoustic mode with rolling demonstrate that crystallite stacking periodicity is gradually lost and that crystal thickness remains unchanged.

Item Type:	Article
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:	https://doi.org/10.1016/0032-3861(94)90806-0
Page Range:	4578-4589
Depositing User:	Hilary Ridgway
Date Deposited:	12 May 2010 11:08
Last Modified:	18 Mar 2021 09:15
URI:	https://shura.shu.ac.uk/id/eprint/1809

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