HYDRODYNAMIC BEHAVIOR OF CELLULOSE TRIACETATE IN SOLUTION AND STRUCTURE OF INTERFACE

Concentrational dependences of eta-rel of CTA solutions (n = 300; 95) in CHCl3 and absorptional IR-spectra of dilute and moderately concentrated polymer solution and reflection spectra of boundary layers corresponding to the CTA solution - solid interface have been studied using expressions relating eta-rel with the degree of filling of the hydrodynamic volume [eta]0c. The sharp increase of the polymer mesophase concentration in the solution volume for [eta]0c greater-than-or-equal-to 7 is related with existence of the critical effective volume occupied by CTA molecules. Its exceeding results in the predomination of the polymer-polymer contacts comparing with polymer-solvent ones. The transition from the solution volume phase to polymer interface results for [eta]0c greater-than-or-equal-to 2 in the essential increase of the polymer mesophase concentration. For [eta]0c < 1 CTA macromolecules have the high orientational order under the action of the carrier field and are disposed by the such way that the long axis of a molecule is perpendicular to the interface. The parameters of macromolecules orientation in the interface correspond to the nematic LC phase.