Premium
Effect of flow on topological interactions in polymers
Author(s) -
Marrucci Giuseppe,
Ianniruberto Giovanni
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971170127
Subject(s) - dumbbell , polymer , nonlinear system , rheology , simple (philosophy) , flow (mathematics) , constraint (computer aided design) , materials science , chemical physics , topology (electrical circuits) , physics , mechanics , thermodynamics , mathematics , geometry , biology , philosophy , epistemology , quantum mechanics , combinatorics , composite material , physiology
The dynamics of concentrated polymers of high molecular mass is dominated by topological interactions (or entanglements). The nonlinear effects shown by these systems in fast flows are still poorly understood, however. We have recently noted that a mechanism of convective constraint release should play a significant role in the nonlinear range, and preliminary calculations have been made both for a simple dumbbell model and for the tube model of Doi and Edwards. Here we show that further elaboration of the simple dumbbell model can predict quite complex rheological behaviours such as those observed by Navard and coworkers in semi‐dilute solutions of ultrahigh molecular mass polymers.