Abstract
Non‐reversing and reversing double‐step strain flows on concentrated, moderately entangled polystyrene in diethyl phthalate (DEP) or tricresyl phosphate (TCP) were employed to characterize the properties of transient entanglement network and, in particular, its impact on subsequent chain stretch and relaxations. Contrast was made between nonlinear stress relaxation data with specially designed protocols for imposing the first or the second strain. An analytical formulation based on an extension of the Doi‐Edwards tube theory was employed to retrieve the nominal segmental stretch following the second strain. There appears to be clear evidence showing that the flow‐induced transient entangled network affects the subsequent material deformation and chain relaxations.
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