Molecular characteristics of cellulose tributyrate according to results of light scattering and hydrodynamic properties of solutions

Abstract

It was shown by light scattering that cellulose tributyrate (CTB) molecules have increased rigidity. The size of the Kuhn segment reaches 200 Å in methylethyl ketone and 140 Å in bromoform. The conformation of CTB molecules in solution in the range of molecular weights studied corresponds to the conformation of a Gaussian sphere, which is characterized by the flow effect caused by a considerable equilibrium rigidity of the macromolecular chain of CTB. Molecular chain diameters of CTB calculated from experimental results are correlated with values obtained previously from hydrodynamic results. © 1977.