Chain retraction potential in a fixed entanglement network.

  title={Chain retraction potential in a fixed entanglement network.},
  author={Sachin Shanbhag and Ronald G. Larson},
  journal={Physical review letters},
  volume={94 7},
When a chain, tethered at one end, is immersed in a fixed entanglement network, the mobile tip of the chain encounters an entropic potential barrier that penalizes deep fluctuations needed to bring the tip close to the tethering point. Using the tube model, Doi and Kuzuu [J. Polym. Sci., Polym. Lett. Ed. 18, 775 (1980)] estimated that this potential, which is crucial to describe the rheology of branched polymers in fixed networks and melts, has a quadratic form with a prefactor nu = 1.5. Later… CONTINUE READING