Possibility that the state of solution of viscose may be estimated from the symbols in viscosity formula was investigated. The viscoses were prepared by the emulsion xanthation methode. Concentration of cellulose is 2%. The results are as follows:
(1) Št. Kalafut evaluted a quality of viscose through a symbol “
N” in Baker's equation, η_??_=(1+
C [η]/
N)
N. However it was found that for this purpose Martin's equation, log (η
sp/
C)=log [η]+
k [η]
C is more appropriate for its simplicity in treatment for the results obtained.
(2) The symbols [η] and “
k” in Martin's equation were used as parameters relating to the state of viscose solution. As was expected, [η] is proportional to the size of solute particles. On the other hand “
k” is affected mainly by the interaction between the solute and the solvent. So it seems that for the evaluation of the state of viscose solution “
k” is more suitable than [η].
(3) The viscose containing 14% of sodium hydroxide was diluted just before the viscosity measurement. The value
k of each viscose decreases as the concentration of sodium hydroxide decreases. On the other hand, “
k” of viscoses prepared from lower concentration of sodium hydroxide solution increases with decreasing concentration of sodium hydroxide.
(4) Within the range of experiments it may be said that the difference of the states of viscose solutions is recognized by a parameter
k. The fact found by Št. Kalafut that the viscose giving small value in
N (=
k) has a good quality is ascertained.
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