Dynamics of polymers across an interface
Department of Chemistry, Clemson University - Clemson, SC 29634, USA
2 Sandia National Laboratories - Albuquerque, NM 87185, USA
Accepted: 26 June 2011
The migration of polymers across an interface as welding and self-healing of polymer layers takes place, is in the core of polymer-based devices. Using large-scale molecular-dynamics simulations the motion of polymer chains across an interface has been investigated. Unlike self-diffusion of polymers in melts where the early stages of diffusion are characterized by the reptation-like motion of chains in constraining tube formed by neighboring molecules, we find that interdiffusion across an interface is dominated by motion of the chain ends.
PACS: 61.25.hk – Polymer melts and blends / 82.35.Gh – Polymers on surfaces; adhesion / 83.10.Mj – Molecular dynamics, Brownian dynamics
© EPLA, 2011