US EPA

6760277 

Journal Article 

Large strain stress relaxation and recovery behavior of ethylene-styrene interpolymers 

Chen, H; Stepanov, EV; Chum, SP; Hiltner, A; Baer, E; , 

1999 

SOC PLASTICS ENGINEERS 

BROOKFIELD CENTER 

2144-2148 

WOS:000080784900406 

The large strain, nonlinear stress relaxation and recovery behavior of amorphous ethylene-styrene interpolymers (ESIs) was studied at temperatures above the glass transition temperature (Tg). At longer times, the nonlinear stress relaxation curves could be superposed by vertical shifting. The damping function determined from these shift factors was well described by the Doi-Edwards tube model. The instantaneous recovery after stress relaxation was also investigated. For lower temperatures and shorter times, the data were described by Gent's two network model. At higher temperatures, this model was no longer applicable. A modified two network model using the damping function from stress relaxation was developed to successfully describe the instantaneous recovery. 

1-56676-804-7 

57th Annual Technical Conference of the SPE on Plastics Bridging the Millennia (ANTEC 99) 

NEW YORK, NY