Tube Dynamics Works for Randomly Entangled Rings.
作者： Jian Qin , Scott T. Milner
DOI: 10.1103/PHYSREVLETT.116.068307
关键词: Tube (fluid conveyance) 、 Polymer 、 Ring (mathematics) 、 Rheology 、 Mechanics 、 Relaxation (physics) 、 Physics 、 Motion (geometry) 、 Dynamics (mechanics) 、 Molecular orbital theory
摘要: The tube model is the cornerstone of molecular theory for polymer rheology. We test its microscopic assumptions by simulating topologically equilibrated ring polymers, whose dynamics free from end segment relaxation. show that a closed-form expression derived adapted to polymers quantitatively predicts segmental mean squared displacements over entire range time scales local motion complete equilibration, with time-independent friction factor.
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