On the Configuration of Chain Molecules. II

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Abstract
In order to express the apparent size of a flexible long chain molecule the radius of gyration σ around the centre of mass is an appropriate quantity, and its mean square 〈σ2〉 has been considered to be proportional to the number of elements of the chain n. We estimate the effect of the intramolecular interaction and find new equations &〈σ^2〉=const·n+const·n^1.5 &〈σ^2〉=const·n^1.5+const·n^2 Specific viscosity ηsp divided per weight concentration c must be &η_sp/c=const·n+const·n^1.5 \intertextor &η_sp/c=const·n^0.5+const·n In these equations the second term can never be neglected for large n. It amounts to one half of the first term even in the case of normal paraffine with only 100 carbon atoms. For large n the accurate formula η_sp/c=const.n^0.5+const.n^0.8 is obtained in the case of repulsive interaction, but in respect to the molecule of large molecular weight with attractive interaction the selfcoagulation into the very small size is concluded.

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