| Abstract: | Conclusions Conclusions about the decrease in critical values of shear stress and shear rate with increase in the ratio of capillary length to capillary diameter at constant flow rates, and about the increase in critical values of shear stress and shear rate on the use of spinnerets with a conical inlet have been confirmed on polyacrylonitrile solutions having a high concentration.A second region of stable flow of polyacrylonitrile solutions having concentrations of 17.7% by wt. has been found in short capillaries (with a length of 3 or 10 mm).Translated from Khimicheskie Volokna, No. 2, pp. 23–24, March–April, 1990. |
