抄録
Sodium alginate was prepared as usual from “arame”, a brown seaweed Eisenia bicylis, and examined for solution properties. The number-average and the weight-average molec-ular weights of “arame” alginate were 12.2×104 and 40.0×104, respectively. The radius of gyration, RG, was changed from 1018Å at I=0 to 877Å at I=0.1. A small amount of precipitate was formed when I was raised to 0.5. A concentrated solution of the alginate exhibited thixotropic properties. The deviation from Newtonian behavior increased as the temperature was lowered, and as the concentration of alginate or salt was increased. From the results of viscometry, a three-dimensional structure of the alginate solution was suggested.
