期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 27, 期 47, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/27/47/473002
关键词
entangled polymers; branched polymers; viscoelasticity; rheology; shear flow; uniaxial extension
资金
- EU [214627]
We briefly review the recent advances in the rheology of entangled polymers and identify emerging research trends and outstanding challenges, especially with respect to branched polymers. Emphasis is placed on the role of well-characterized model systems, as well as the synergy of synthesis-characterization, rheometry and modeling/simulations. The theoretical framework for understanding the observed linear and nonlinear rheological phenomena is the tube model, which is critically assessed in view of its successes and shortcomings, and alternative approaches are briefly discussed. Finally, intriguing experimental findings and controversial issues that merit consistent explanation, such as shear banding instabilities, multiple stress overshoots in transient simple shear and enhanced steady-state elongational viscosity in polymer solutions, are discussed, and future directions such as branch point dynamics and anisotropic monomeric friction are outlined.
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