Effects of Temperature and Strain Rate on Deformation of Polymers during Hydrostatic Extrusion
As reported in a companion paper , quite a variety of crystalline and amorphous polymers were hydrostatically extruded with extrusion ratios ranging from 1.2 to 10, and a linear relation was obtained between the extrusion pressure p and extrusion ratio R. Buckley and Long have hydrostatically extruded polyethylene, polypropylene, and some other polymers and have also obtained a linear relation between p and R . The linear relation between p and R was also established by Davis for polyethylene , and by Yoon et al. for polypropylene . Nakayama and Kanetsuna , on the other hand, hydrostatically extruded polyethylene at various levels of temperature and obtained an exponential relation between p and R. Recently, Nakayama et al.  also established a nonlinear relation for polypropylene.
KeywordsPolyvinyl Chloride True Stress Deformation Pattern Extrusion Ratio Static Extrusion
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