Effect of molecular weight and its distribution on the spinodal for polydisperse polymer solutions |
| |
| Authors: | Xiyan Du Zhaoyan Sun Lijia An |
| |
| Institution: | State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, PR China |
| |
| Abstract: | The Flory–Huggins interaction parameter χ(ri) is considered as dependent on the chain length of a polymer. Therefore, a modified free energy expression of Flory–Huggins theory is obtained for the polydisperse polymer solutions. Based on this modified free energy expression and the thermodynamics of Gibbs, the expression of spinodal for polydisperse polymer solutions is obtained. For a given χ(ri) according to de Gennes, the spinodals are calculated for polydisperse polymer solutions at different molecular weights and their distributions. It is found that all the interested variables rn, rw, rz and molecular weight distribution have an effect on the spinodal for polydisperse polymer solutions, where the effect of changing rw is much greater than that of changing rn, rz and molecular weight distribution. |
| |
| Keywords: | Flory–Huggins theory Polymer solution Polydispersity Spinodals |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
