Mean-field theory of polymer melting
The authors study the Flory model for the melting of a semiflexible polymer chain on a lattice. Using a field theoretical representation of the partition function, they propose a new mean-field theory. Within this theory, the system undergoes a first-order transition at temperature Tc, between a liquid-like phase at temperature T)Tc and an ordered (almost stretched) phase at T(Tc, in agreement with the original Flory idea. In addition, they find a disorder point TD()Tc), separating two liquid phases with different short-range correlations. For T)TD, the short-range correlations are isotropic, whereas for T(TD, one-dimensional short-range order sets in. This disorder point may be relevant to the glass transition.
Journal of Physics A Mathematical General
- Pub Date:
- December 1992