Deformation of the Regenerated Cellulose Fibers III. Deformation and Refractive Indices of Air-Dried Filament

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Abstract
Deformation of the dried filament can be expressed in the term of the first theory of Kratky on the whole as in the case of swollen filament. And this behavior is not affected by the slight change of the spinning conditions of the filament such as the temperature and the composition of the cellulose solution. But in the case of the filament dried in the less humid air the orientation occurs more prominently in the early stage of the stretching but soon follows the above deformation mechanism. This drying effect will illustrate the variation seen in the previous paper. Of course it is noteworthy that the value of l0d changes a few percent with the variation of the air humidity during measuring and, therefore, this factor must be taken into consideration when l0d and l2d are read under the different air conditions. Some of our older data are thought to contain small fuctuations due to this fact.