Abstract
Viscosities of cellulose triacetate solutions were determined and the relations between viscosity, concentration and d. p. were tested.
The samples were from purified cotton linters and wood pulps and their acetyl contents and d. p. were 60.0_??_60.8% and ca. 200_??_390, respectively.
The solvents used were the mixture of methylene chloride-methanol, 9:1 by weight and the concentration ranges were 13_??_18%.
In the ranges of concentration and d. p. tested the relations between viscosity (η), concentration (C) and d. p. (P) were as follows: log η=KC+A and log η=kP+a where K, k and A, a are constants.
It was also found that the viscosities of cellulose triacetate from purified wood pulps are higher than those of purified cotton linters.
