Constraint Release mechanisms of star chains moving in a short polymer matrix
(2016) The XVII International Congress on Rheology — Location: Kyoto, Japan (8.August.2016)
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- Authors
Taghipour, Hamid 
- Abstract
- The linear viscoelastic properties of model polymer melts are, today, quite well understood. Also, tube-based models have shown their large capability to describe the different relaxation mechanisms. However, several questions remain, which need to be solved in order to obtain a fully quantitative model. In particular, tube models seem to fail in predicting the relaxation of binary blends of monodiperse polymers characterized by very different relaxation times, such as blends of linear and star polymers or blends of short and long star chains. The objective of this work is to further investigate the relaxation mechanisms of such blends and in particular, to study the importance of constraint release process in the slow motions of the (long) star chains. To this end, we review a series of binary blends presented in literature and analyze their relaxation based on our TMA model. This is illustrated here with a set of blends obtained from polybutadiene star chains with arms of mass 25 kg/mol and linear chains of 7 kg/mol.
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Citations
Van Ruymbeke, E., & Taghipour, H. (2016). Constraint Release mechanisms of star chains moving in a short polymer matrix. The XVII International Congress on Rheology, Kyoto, Japan. https://hdl.handle.net/2078.5/49688