Fracture And Yielding Behaviors Of Polystyrene/ethylene - Propylene Rubber
Blends: Effects Of Interfacial Agents
Author(s)
T. Ha Anh & T. Vu-Khanh
Abstract
Fracture and yielding behaviors of
polystyrene/ethylene - propylene rubber
blends: Effects of interfacial agents
T. Ha Anh & T. Vu-Khanh
Department of Mechanical Engineering, Sherbrooke University, Canada.
Abstract
The aim of this work is to understand the effects of two triblock copolymers of
different molecular weights on fracture and yielding behaviors of a blend of 80
volume % of polystyrene (PS) and 20 volume % of ethylene - propylene rubber
(EPR), over a large range of loading rates and temperatures. The focus is put on
the time - temperature dependence of fracture performance of these blends. The
correlation between temperature and loading rate in yielding behavior of the
blends seems to be controlled by the molecular relaxation according to the Ree-
Eyring theory. This model, based on the assumption of two Eyring processes (a
and p processes) acting in parallel, allows prediction of the tensile and
compression yield stress at various loading rates and temperatur
Keywords
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