Self-diffusion coefficient of ring polymers in semidilute solution

Iyer, Balaji V. S. ; Shanbhag, Sachin ; Juvekar, Vinay A. ; Lele, Ashish K. (2008) Self-diffusion coefficient of ring polymers in semidilute solution Journal of Polymer Science Part B: Polymer Physics, 46 (21). pp. 2370-2379. ISSN 0887-6266

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/polb.21...

Related URL: http://dx.doi.org/10.1002/polb.21569

Abstract

In a topologically constraining environment the size of a flexible nonconcatenated ring polymer (macrocycles) and its dynamics are known to differ from that of linear polymers. Hence, the diffusion coefficient of ring polymers can be expected to be different from linear chains. We present here scaling arguments for the concentration and molecular weight dependence of self-diffusion coefficient of ring polymers in semidilute solutions, and show that contrary to expectations these scaling relations are identical to what is known for linear polymers. At higher concentrations excluded volume interactions arising from possibilities of segmental overlap can become effective for large ring polymers. In this regime the diffusion coefficient of large ring polymers shows a relatively weaker dependence on concentration and molecular weight.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Diffusion; Macrocycles; Monte Carlo Simulation
ID Code:60568
Deposited On:09 Sep 2011 06:57
Last Modified:09 Sep 2011 06:57

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