Statistical thermodynamics in the framework of the lattice fluid model, 1. Polydisperse polymers of special distribution

✍ Scribed by Lijia An; Bingzheng Jiang; Yuxin Hu; Zhenhua Jiang; Xinyi Tang

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 280 KB
• Volume: 3
• Category: Article
• ISSN: 1022-1344
• DOI: 10.1002/mats.1994.040030409

✦ Synopsis

Abstract

The Gibbs free energies and equations of state of polymers with special molar mass distributions, e.g., Flory distribution, uniform distribution and Schulz distribution, are derived based on a lattice fluid model. The influence of the polydispersity (or the chain length) on the close‐packed mass density, the close‐packed volume of a mer and the mer‐mer interaction energy or the scaling temperature is discussed. The diagrams of the Gibbs free energies as a function of temperature and chain length are simulated with a computer. The results suggest that a polydisperse polymer is thermodynamically more stable than the corresponding monodisperse polymer and that the thermodynamical properties of a polydisperse polymer are identical with those of the corresponding monodisperse polymer when the average degree of polymerization is sufficiently high.