Trituration of gel particles as a function of the viscosity of the spiraling solution is shown in Fig. 2. "Trituration time" in this case means the time the gel particles remain in the velocity gradient field ~here they undergo deformation ~ = 1. The shear strength of the gel particles is set equal to 108 dyne/cm 2 (-1 kgf mm2). The velocity gradient is 103 sec -1. The practically applicable duration of treatment, equal to 2-10 sec, is attained for a viscosity of (10-50)103 P.The ultrapure acrylic spinning solutions for spinning PAN fibres and twists used as the precursor in production of highstrength carbon fibres can probably be fabricated with the above scheme, i.e., by trituration of gel particles in a highly viscous spinning solution, t~. A. Pakshver and L. M. Beder came closest to this in proposing dissolution of suspended PAN powder
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