Abstract
First, in a fashion similar to procedure used in the previous studies, fine structures of cellulose gels coagulated freely with typical bath components such as Zn++, Na+ and H+, were investigated with regard to their colloid-chemical behaviours upon viscose respectivly.
Next. using the fibres spun freely with acid bath only, fine structure of the cuticle layer (thin outermost layer) was examined by method of peeling-off.
It has been confirmed again that regenerated cellulose gel structure are divided into two classes which differ extremely in degree of crystallinity, -the α-type structure such as that of cellulose gel coagulated by Zn++ and the cuticle layer, and the β-type structure such as that of cellulose gel coagulated by Na+ or H+. The most logical explanation for a difference in mechanisms between the α- and β- structure formations, appears to be a difference in speed of gelatination into xanthate gel. And it has been presumed that the α-type structure is formed when gelatination takes place momentarily in the order corresponding to the relaxation time of macromolecules in viscose.
