The theory of dipole-dipole correlation in nematic liquid crystals is presented and it is shown that different models for the internal field lead to different values for dipole correlation factors. Results of calculations are presented for three liquid crystals and commented upon. Using the calculated correlation factors and a simplified dielectric theory, predictions are made of the temperature derivatives of the mean permittivity and permittivity anisotropy and compared with experimental values.
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Dunmur et al. (1980) studied this question.
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