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Fractional Debye-Stokes-Einstein Law in Polymeric Liquid Crystals

Published online by Cambridge University Press:  10 February 2011

L. Andreozzi ,
C. Donati ,
M. Giordano  and
D. Leporini
L. Andreozzi
Affiliation:
Dipartimento di Fisica, Universita' di Pisa, Piazza Torricelli 2, 1-56100 Pisa ITALY, leporini@ipifidpt.difi.unipi.it
C. Donati
Affiliation:
Scuola Normale Superiore, Piazza dei Cavalieri, 1-56100 Pisa ITALY, donati@ipifidpt.difi. unipi.it
M. Giordano
Affiliation:
Dipartimento di Fisica, Universita' di Pisa, Piazza Torricelli 2, 1-56100 Pisa ITALY, leporini@ipifidpt.difi.unipi.it
D. Leporini
Affiliation:
Dipartimento di Fisica, Universita' di Pisa, Piazza Torricelli 2, 1-56100 Pisa ITALY, leporini@ipifidpt.difi.unipi.it
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Abstract

The viscosities of amorphous and semicrystalline polymeric liquid crystals η have been measured by dynamic mechanical analysis. They have been compared with the rotational correlation times of molecular probes, as drawn by Electron Spin Resonance spectroscopy on two different time scales. In all the cases the correlation times of the spinning motion of a cigar-like probes τ| and η are related by a fractional Debye-Stokes-Einstein law, i.e.η| α ηξ, ξ ≤ 1.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 407: Symposium M – Disordered Materials and Interfaces-Fractals, structure and Dynamics , 1995 , 233
Copyright
Copyright © Materials Research Society 1996

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References

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