MOYSES, S. and SPELLS, S. J. (1998). Neutron scattering studies of syndiotactic polystyrene/ethylbenzene. Polymer, 39 (16), 3665-3674.Full text not available from this repository.
The neutron scattering observed from delta-phase samples of syndiotactic polystyrene (sPS)/ethylbenzene is shown to be consistent with sheet-like arrangements of crystal stems arranged along the a direction. Adjacent stems therefore show an alternation in helicity. Simulations based on a statistical model have been used to calculate statistical parameters, such as the probability of adjacency (P-A) for which optimum agreement is found for a value of 0.8. Radii of gyration obtained from simulations are in good agreement with experimental values. The molecular weight range studied appears to cover the change from a single-sheet structure to a superfolded double sheet. The same stem statistics (with P-A = 0.8) apply, irrespective of molecular weight. Scattering data from the gamma phase of sPS are well reproduced by a model involving some movement of stems out of the planes of the sheets. (C) 1998 Elsevier Science Ltd. All rights reserved.
|Research Institute, Centre or Group:||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 11:19|
|Last Modified:||29 Sep 2010 08:46|
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