A STUDY ON RHEOLOGIC BEHAVIOR OF POLYPHENYLENE SULFIDE

Rheologic behavior of the common Ryton-type poly(phenylene sulfide) (P PS) and Fortron PPS has been studied using a capillary rheometer. The effects of shearing rate, shearing stress, and temperature on the appa rent viscosities of PPS are discussed. The non-Newtonian index and the activation energy of the viscous flow were obtained. The results show that the apparent viscosity of the Ryton PPS decreased obviously with increase of shearing rate or shearing stress, and with increase of th e temperature, the apparent viscosity is not considerably decreased. O n the contrary, the apparent viscosity of the Fortron PPS is more sens itive to temperature than to shearing rate and shearing stress. (C) 19 95 John Wiley and Sons, Inc.