Excluded Volume Effect and Light Scattering of Chain Polymers

概要

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The excluded volume effect on the partial chain segment with arbitrary length in polymer molecule is calculated, by extending a previous treatment of the same effect on the end to end distance of the polymer. The intramolecular potential calculated becomes a decreasing and almost linear function of the end to end distance of the chain segment. The expansion coefficient α_<ij> of this distance is determined by this potential, and the result is given by the approximate equation α^5_<ij>-α^3_<ij>=B_<ij>(|j-i|/n)^<1/2>z, where B_<ij> is a constant, n is the total number of constituent segments in the polymer and z is their interaction parameter. This result coincides with that of the first order perturbation theory. Considering that α_<ij> depends on the chain segment-length |j-i|, the angular distribution of scattered light by this polymer is calculated. The result shows the deviation from the Debye's scattering function for ideal random coil chains.
社団法人日本物理学会の論文
1972-12-05