Structural and morphological features of the syndiotactic polystyrene/ethylbenzene complex

MOYSES, S., SONNTAG, P., SPELLS, S. J. and LAVEIX, O. (1998). Structural and morphological features of the syndiotactic polystyrene/ethylbenzene complex. Polymer, 39 (15), 3537-3544.

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The delta-phase of the syndiotactic polystyrene/ethylbenzene system, as formed by crystallisation from dilute solution, is shown to result in a lamellar morphology, with a monoclinic crystal lattice similar to that already reported for the complex with toluene. Combined SAXS, FTi.r., d.s.c. and t.g.a. measurements show that an increase in the X-ray long period between 80 and 120 degrees C is related to solvent loss and decomplexation. There is also some temporary loss in helical order. SANS measurements on the delta-phase reveal negligible isotopic fractionation. The small increase in the in-plane radius of gyration with increasing molecular weight is interpreted as evidence of a sheetlike molecular conformation, with superfolding at higher molecular weights leading to a multiple sheet structure. On transformation to the solvent-free gamma-phase, an increase in radius of gyration results from a displacement of crystal stems out of the delta-phase sheets. (C) 1998 Elsevier Science Ltd. All rights reserved.

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:
Page Range: 3537-3544
Depositing User: Hilary Ridgway
Date Deposited: 12 May 2010 12:16
Last Modified: 18 Mar 2021 09:15

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