DOI: 10.1051/jp2:1993147
J. Phys. II France 3 (1993) 503-513
Nonlocal dielectric response in dipolar polymers
M. Warner and M. E. CatesCavendish Laboratory, Madingley Road, Cambridge CB3 OHE, Great-Britain
(Received 15 October 1992, accepted 5 January 1993)
Abstract
We calculate the nonlocal dielectric susceptibility
for a fluid of rods carrying dipoles pointing along their axes. At short distances, of order the rod diameter, we get a value
of
considerably smaller than that of a fluid of individual monomers. At distances comparable to the rod length,
climbs to a value
N times larger than a fluid of monomers, as expected. In between these two limits dipolar rods are predicted to exhibit a form
of Debye-Hückel screening. the relevance to internal field calculations and to direct experiments is pointed out. We also
calculate the response of dipolar Gaussian chains.
41.10D - 61.25H - 77.20 - 77.30
© Les Editions de Physique 1993