Confinement-induced fluid-gel transition in polymeric solutions
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The viscoelastic properties of confined polymer solutions are probed by particle-tracking microrheology. The mean squared displacement of spherical probe particles embedded in the solution and the storage and loss moduli of the system are measured as the level of confinement is increased. It is found that those quantities change continuously as the confinement increases, and, at severe conditions, when the constrain reaches the size of the polymer molecule, the system undergoes a transition from a viscoelastic fluid to a gel. © 2009 American Chemical Society.
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Confined polymers; Fluid-gel transitions; Loss moduli; Mean squared displacement; Microrheology; Polymer molecule; Polymeric solution; Spherical probes; Visco-elastic fluid; Viscoelastic properties; Gelation; Gels; Polymer solutions; Probes; Polymers; polymer; article; chemistry; elasticity; gel; mechanics; particle size; solution and solubility; viscosity; Elasticity; Gels; Mechanical Processes; Particle Size; Polymers; Solutions; Viscosity
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