高分子溶液の年弾性と構造変化 : 高分子レオロジー

概要

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The apparent viscosity of a concentrated high polymer solution decrease with increasing velocity gradient. This is called the structural viscosity. This is due to the dispersion of highly associated polymer molecules into molecules of smaller degree of association, by the effect of the velocity gradient. The structure change like this should obviously affect the dynamic viscosity and the dynamic elasticity of the high polymer solution. The Rouse theory on the viscoelastic properties of high polymer solutions does not sufficiently explain all the experimental results. the theory can not show the existence of the structural viscosity either. The existence of the structural viscosity and some anomalous viscoelastic properties may, however, be explained, if the Rouse theory is extended and applied to a mixture of highly associated polymer molecules and single polymer molecules ( or, of lower degree of association), and if it is assumed that the ratio of these two components varies with the frequency or velocity gradient.
社団法人日本材料学会の論文
1960-04-15