RHEOLOGICAL INVESTIGATION OF VISCOSE SOLUTIONS, CONTAINING SODIUM VINYLSULPHONATE BY THE METHOD OF EXPERIMENTAL-DESIGNS

The rheological behaviour of viscose solutions, containing sodium viny lsulphonate as additive has been studied. It is shown that their curve s can be described well by the model of Ostwald-de Waele. With the aim to reveal the quantitative dependence of the rheological coefficients ''K'' and ''n'' in this model, on the sodium vinylsulphonate concentr ation, time and temperature of tau = f(gamma) measurement, the method of the designed experiment has been used. The regression equations thu s obtained show that the addition of sodium vinylsulphonate in concent ration up to 5%, which makes possible to avoid the use of the Zn - con taining bath in viscose fibres production, increases the fluidity of t he viscose solutions.