| 초록 |
We proposed a molecular thermodynamic framework to describe water uptake system of branched polymer solutions. Water uptake of the polymer membrane depends on chemical activity of polymer/solvent system. To understand the membrane/water behavior, in this study, we develop a lattice model for polymer-solvent system, Lattice Cluster Theory(LCT). Lattice Cluster Theory is analyze the major portion of possible figures and interactions of monomers, shows structure effect of membrane, include entropic correlation and interaction energy correlation. To account for highly oriented interactions between segments, the proposed model requires an additional parameter (δε/k) related to the energy of the oriented interaction. The internal energy and the chemical potential are determined for united atom lattice models, and developed activity of the water. We explained water activity with many structure such as Nafion, Aciflex, Flemion, and others. |
