FEATURES OF EXTRUSION PROCESSING OF ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE. EXPERIMENT AND THEORY

Experimental studies have been made of the permissible regimes of processing ultrahigh molecular weight polyethylene GUR 2122 with molecular mass of 4.5 million g/moles in a laboratory extruder with an auger diameter 32 mm and a ratio L/D = 20 at temperatures of 155–165^o C. On the basis of rotational viscometry, the rheological properties of the melt are described. A mathematical model and a numerical method for calculating the motion of ultrahigh molecular weight polyethylene melt in the auger and in the moulding rigging are proposed. The velocity and stress fi elds have been determined
   
Author:  O. I. Skul′skii and E. V. Slavnov
Keywords:  ultrahigh molecular weight polyethylene, extrusion, mathematical model, fi nite element method, velocities, stresses, working points
Page:  556