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Radius of Gyration Scaling in the Semidilute Regime

Published online by Cambridge University Press:  22 February 2011

J.G. Barker ,
A.M. Mayes ,
R.M. Briber  and
W.J. Orts
J.G. Barker
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
A.M. Mayes
Affiliation:
Massachusetts Institute of Tech., Dept. of Materials Science and Eng., Cambridge, MA 02139
R.M. Briber
Affiliation:
University of Maryland, Dept. of Materials and Nuclear Eng., College Park, MD 20742
W.J. Orts
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
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Abstract

Small-angle neutron scattering is used to investigate swelling effects of polystyrene in carbon tetrachloride and cis-decalin in the semidilute regime. The observed scaling exponent m where Rg2 ~ ф-m was m=0.15±0.01 both in carbon tetrachloride and in cis-decalin at T=180 C, which is much weaker than the theoretical prediction m=0.25. A review of the literature has found the scaling exponent to vary from 0.1 to 0.25. Possible causes for this variation in the observed scaling exponent are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 291
Copyright
Copyright © Materials Research Society 1995

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References

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