懸濁製剤の研究 (第8報)

Sodium Carboxymethylcellulose GelのWeissenberg効果について

抄録

Sodium carboxymethylcellulose (Na-CMC) possesses viscoelastic properties and should naturally show the Weissenberg effect. Relationship between this effect and thixotropy was examined with thixotropic substances, such as Na-CMC gel. Measurement of the Weissenberg effect while continuously changing the number of revolution indicated the presence of a hysteresis loop with up and down curves, as was also recognized in flow curve. The Weissenberg effect was found to change in accordance with destruction and thixotropy of the gel and its qualitative explanation was well explained by exactly the same method of explanation as in thixotropy.