Note on the Solution Properties of Amylose

Abstract

In order to evaluate the contribution of draining effect of polymer chain to thesolution properties and to determine the dependence of the configuration on the solvents, intrinsic viscosity-molecular weight relationships (Mark-Houwink equations) for various solutions of amylose were analyzed on the basis of Kamide and et al's treatment (this journal, 20, 512 (1963); 21, 682 (1964)). The solvents used were classified into two groups;(a) Dimethylformamide (DMSO)-water and DMSO-M/2 KCl, (b) DMSO, DMSO-methanol, DMSO-acetone, water and formamide. In the case of ethylenediamide (EDA) and EDA-M/2 KCl the solutions behave differently from groups (a) and (b), owing to their strong affinity for moisture. Flory constants K obtained were 6.2×10^-4 and 8.0×10^-4 for groups (a) and (b), respectively. The characteristics of group (a) may be explained by the specific interaction of the polymeric chain molecules with the complex, DMSO ……2H₂O, formed in the solutions. It became clear that the draining effect can be almost completely neglected in the solution of amylose.