Eyring theory

Eyring theory

[′ī·riŋ ‚thē·ə·rē]
(fluid mechanics)
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The Eyring theory has been successfully used to describe the yielding behavior of a number of polymers: for example, polymethylmethacrylate (PMMA) (18), polyethylmethacrylate (PEMA) (19), isotactic polypropylene (iPP) (20, 21), polycarbonate (22, 23), polyethylene (PE) (24), polyethylene terephthalate (PET) (25), and high impact polystyrene (HIPS) (26).
c], the Ree-Eyring theory reduces to the Eyring theory in terms of a single activated process and in this case, the plots of yield stresses versus log (strain-rate) or versus temperature, must give straight lines.