Shape of threadlike molecules in solution, and relationship between solution viscosity and molecular weight

Translated reproduction of Sakurada, I. Empirical Relationship between Intrinsic Viscosity and Molecular Weight [Youeki nendo to bunshiryo no kankei]. In: Proceedings of the 5th Meeting** of Kyoto Imperial University, Research Institute for Chemical Fibers, Japan. [Nihon Kagaku Sen-i Kenkyusho], 33–44, 1940, Kyoto. Translation by Yutaka Sakurada

In recent years, the results of scientific research have indicated that the substances that form natural fibers, and regenerated man-made fibers, are chemically composed of long molecules, which are referred to as threadlike molecules. Synthetic threadlike molecules from which synthetic fibers are prepared cannot be derived directly from natural materials but are synthesized by chemically bonding many small molecules, that is, by polymerization reactions.

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