2004 Volume 77 Issue 4 Pages 661-665
The present communication reports on the experimental values of the mutual viscosity (η12) and NMR spin-lattice time (T1) of o-nitrobenzoic acid, m-nitrobenzoic acid, p-nitrobenzoic acid, o-hydroxybenzoic acid, m-hydroxybenzoic acid, p-hydroxybenzoic acid, and m-chlorobenzoic acid. The small difference between the values of η12 and η1 suggests that the basic model of the dielectric relaxation process does not suffer any major changes even when η12 is used instead of η1. The experimental values of the NMR spin-lattice relaxation time (T1) have been correlated with the calculated values of T1 obtained using various equations of the dielectric relaxation time (τ). It has been concluded that the equations of Writz and Murty are better representations of the dielectric relaxation phenomenon.
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