Neutron scattering studies of syndiotactic polystyrene/ethylbenzene

MOYSES, S. and SPELLS, S. J. (1998). Neutron scattering studies of syndiotactic polystyrene/ethylbenzene. Polymer, 39 (16), 3665-3674.

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Abstract

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.

Item Type:	Article
Research Institute, Centre or Group:	Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre > Polymers, Composites and Spectroscopy Group
Identification Number:	10.1016/S0032-3861(97)10329-9
Depositing User:	Hilary Ridgway
Date Deposited:	12 May 2010 12:19
Last Modified:	29 Sep 2010 09:46
URI:	http://shura.shu.ac.uk/id/eprint/1806

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