منابع مشابه
Inhomogeneous Reptation of Polymers
We study the motion of long polymers (eg DNA) in a gel under the influence of an external force acting locally on small segments of the polymer. In particular, we examine the dependence of the drift velocity on the position where the force acts and the length of the polymer. As an application, we discuss the possibility of gel magnetophoresis the size-separation of long polymers by the attachme...
متن کاملDisentanglement and Reptation During Dissolution of Rubbery Polymers
The dissolution mechanism of rubbery polymers was analyzed by dividing the penetrant concentration field into three regimes that delineate three distinctly different transport processes. The solvent penetration into the rubbery polymer was assumed to be Fickian. The mode of mobility of the polymer chains was shown to undergo a change a t a critical penetrant concentration expressed as a change ...
متن کاملDiffusion coefficient for reptation of polymers with kinematic disorder
We give a lower bound on the diffusion coefficient of a polymer chain in an entanglement network with kinematic disorder, which is obtained from an exact calculation in a modified Rubinstein–Duke lattice gas model with periodic boundary conditions. In the limit of infinite chain length we show the diffusive motion of the polymer to be slowed down by kinematic disorder by the same factor as for ...
متن کاملNonlinear Reptation in Molecular Based Hysteresis Models for Polymers
We extend the linear “stick-slip” models of Doi-Edwards and Johnson-Stacer to nonlinear tube reptation models. We then show that such models, when combined with probabilistic formulations allowing distributions of relaxation times, provide a good description of dynamic experiments with highly filled rubber in tensile deformations. A connection to other applications including dielectric polariza...
متن کاملRheology and reptation of linear polymers. Ultrahigh molecular weight chain dynamics in the melt
• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version ...
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ژورنال
عنوان ژورنال: Physica A: Statistical Mechanics and its Applications
سال: 1997
ISSN: 0378-4371
DOI: 10.1016/s0378-4371(96)00385-8