Abstract
In the preceeding paper, we have investigated the relation between heterogeneous structure of cross section of P. V. A. filament and spinning condition by the use of microscope and electron-microscope. Model sample in which skin and core parts can be observed seperately was prepared, in order to observe the detailed properties of both parts.
It was concluded that the main factor for the skin formation was the pressure of water which diffused by osmosis in the coagulation process, since both optical and swelling anisotropies were observed in the gel which was formed by the coagulation under no external force. The difference of adsorption abilities between the skin and core parts was also estimated measuring the diffusion process of iodine and dye through both parts.
