Entanglements in Quiescent and Sheared Polymer Melts

Details Entanglements in Quiescent and Sheared Polymer Melts Entanglements in Quiescent and Sheared Polymer Melts

2004-03-04

arxiv.org/abs/cond-mat/0403137v1

Physics

Condensed Matter

Soft Condensed Matter

19 pages, 11 figures

Scientific paper

10.1103/PhysRevE.70.041801

We visualize entanglements in polymer melts using molecular dynamics simulation. A bead at an entanglement interacts persistently for long times with the non-bonded beads (those excluding the adjacent ones in the same chain). The interaction energy of each bead with the non-bonded beads is averaged over a time interval $\tau$ much longer than microscopic times but shorter than the onset time of tube constraints $\tau_{\rm e}$. Entanglements can then be detected as hot spots consisting of several beads with relatively large values of the time-averaged interaction energy. We next apply a shear flow with rate much faster than the entangle motion. With increasing strain the chains take zigzag shapes and a half of the hot spots become bent. The chains are first stretched as a network but, as the bends approach the chain ends, disentanglements subsequently occur, leading to stress overshoot observed experimentally.

Affiliated with

Also associated with

No associations

Rating

Entanglements in Quiescent and Sheared Polymer Melts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Entanglements in Quiescent and Sheared Polymer Melts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entanglements in Quiescent and Sheared Polymer Melts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-590592