The effect of shear flow on the mesoscopic structure of partially miscible polymer blends

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Publication Date
DOI 10.1039/A901767D
Impact Factor 3.676
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Abstract

Shear flow may have a significant effect on liquid mixtures such as polymer solutions but also polymer blends. The study of the effect of shear on the microscopic and mesoscopic structure of partially miscible polymer blends has recently been the focus of much theoretical and experimental work. Different theoretical approaches used to explain the observed shear induced enhancement or decay of concentration fluctuations in polymer blends are presented here and compared with the available data on several systems. In particular some of our most recent data for a polystyrene/poly(vinyl methyl ether) blend are presented. Our main conclusion is that, to describe all the phenomena encountered when shearing polymer blends, three sometimes competitive factors must be taken into account: the change in the equilibrium thermodynamics of the system due to molecular conformational changes, the coupling between concentration fluctuations and shear stress and the shear droplet break-up effect.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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