Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/15827
Title: Effects of Τube Persistence Length on Dynamics of Mildly Entangled Polymers
Authors: Qin, Jian 
Milner, Scott T. 
Stephanou, Pavlos S. 
Mavrantzas, Vlasis G. 
Major Field of Science: Engineering and Technology
Field Category: Mechanical Engineering
Keywords: Molecular dynamics;Polymers;Polyethylenes
Issue Date: 3-May-2012
Source: Journal of Rheology, 2012, vol. 56, no.4, pp. 707-723
Volume: 56
Issue: 4
Start page: 707
End page: 723
Journal: Journal of Rheology 
Abstract: Recent atomistic simulations of polyethylene melt afford a close look at the entanglement dynamics of a real polymer. We analyze these results in a new way, by defining the tube primitive path as the mean path of consecutive molecular dynamics trajectories. The result suggests that tube is semiflexible, the persistence length being about half the entanglement length. The time dependent tangent–tangent correlation function of tube primitive path is then used to test the standard molecular model of tube dynamics. It is found that the effect of the semiflexibility is important in the mildly entangled system we studied and that incorporating its effect into the standard tube model improves the theory drastically.
ISSN: 0148-6055
DOI: 10.1122/1.4708594
Rights: © 2012 The Society of Rheology.
Type: Article
Affiliation : Pennsylvania State University 
University of Cyprus 
University of Patras 
Appears in Collections:Άρθρα/Articles

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