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Rheology of Phase Separated Block Copolymer Melts

Published online by Cambridge University Press:  21 February 2011

H. Henning Winter  and
Faith A. Morrison
H. Henning Winter
Affiliation:
University of Massachusetts, Dept of Chemical Eng., Amherst, MA 01003, USA
Faith A. Morrison
Affiliation:
ESPCI, Laboratoire PCSM, 10 rue Vauquelin, F-75231 Paris Cedex 05, France
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Extract

Flow can transfer the microphase separated morphology of block copolymers into a state of global order. For tri-block copolymers with cylindrical domains, this has been demonstrated by Folkes et al. (1973) and Hadziioannou et al. (1979). who established the existence of ‘single crystals’ of hexagonally ordered cylinders with uniform director throughout a sheared sample. The director is aligned with the shear direction. In this study, we investigate the flow induced ordering of cylindrical domain structure at increasing levels of shear.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 177: Symposium V – Macromolecular Liquids , 1989 , 245
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

Folkes, M.J., Keller, A. and Scalisi, F.P., Koll. Zeits. Zeits. Polym. 251, 1 (1973).Google Scholar
Hadziioannou, G., Mathis, A. and Skoulios, A., Colloid Polym. Sci., 257, 136 (1979).Google Scholar
Morrison, F., and Winter, H.H., Macromolecules, 22, 3533–3540 (1989).Google Scholar
Morrison, F., Winter, H.H., Barnes, J., and Gronski, W., ‘The effect of unidirectional shear on the structure of triblock copolymers. II.Polystyrene-polyisoprenepolystyrene’, Macromolecules, 1988, under review.Google Scholar