SPELLS, S. J. and OKOROAFOR, E. U. (1994). A neutron-scattering study of polyethylene deformed by rolling. Polymer, 35 (21), 4590-4594.Full text not available from this repository.
Polyethylene mixed crystal mats have been studied after rolling at room temperature to roll ratios up to 2.5, using the LOQ instrument at the ISIS pulsed neutron source (RAL, Chilton). Radius of gyration measurements for vertical (R(v)) and horizontal (R(H)) sectors, where the vertical sector includes the roll direction, show that R(H) is virtually unchanged by rolling, whereas R(V) is increased significantly. Combined with an unchanged intensity from extrapolation to zero angle, these results indicate the absence of local melting during deformation. Intermediate angle measurements show a decrease in intensity, while the 'sheet-like' form of the scattering is retained. This is consistent with the breakup of lamellae into progressively smaller blocks, within which the original stem arrangement is preserved.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Centre for Automation and Robotics Research > Sheaf Solutions
Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre > Polymers, Composites and Spectroscopy Group
|Depositing User:||Hilary Ridgway|
|Date Deposited:||12 May 2010 10:44|
|Last Modified:||29 Sep 2010 08:46|
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