Abstract
Theories of the Kerr constant Km and the optical anisotropy 〈(Δγ)2〉 of polymer molecules are developed on the basis of the additivity principle of bond polarizabilities and the rotational-isomeric-state approximation for rotations about skeletal bonds. Expressions are derived for both (i) polymer chains of finite length but of an arbitrary sequence of bonds and (ii) stereo-regular (or multirepeat) polymers of infinite length. The close similarity between Km and 〈(Δγ)2〉, and of them with the optical anisotropy ΔΓ of Kuhn's random link, is pointed out.
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