Shear banding in semidilute entangled polymer solutions |
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| Affiliation: | 1. School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China;2. Institute for Advanced Study, Tongji University, Shanghai, 200092, China;1. Institute of Ocean Engineering and Technology, Ocean College, Zhejiang University, Zhoushan 316021, China;2. Department of Mechanical Engineering, NUS-Keppel Corporate Laboratory, National University of Singapore, 117576, Singapore |
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| Abstract: | Shear banding in semidilute polymer solutions and other soft materials is one of the most intensely debated topics in current rheology. By means of rheo-optical experiments, physical modeling, and numerical simulations, researchers have started to develop a more thorough understanding of this flow instability within the past few years. Nevertheless, much effort is still required to identify the exact microscopic mechanisms leading to shear band formation and to clarify whether the phenomenon is universal for polymers. For this purpose, basic rheological characteristics, such as the appearance of a stress overshoot during start-up of a simple shear flow, have to be revisited and better related to the dynamics of the polymeric network. |
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| Keywords: | Shear banding Flow instability Semidilute polymer solutions |
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