| New free-volume-related activity model for polymer solutions | |
| Qing Lin Liu ; Liu QL(刘庆林) ; Zhen Feng Cheng | |
| 2005-10 | |
| 关键词 | entropic-FV free volume Gibbs free energy polymer solutions UNIFAC-FV |
| 英文摘要 | A new activity model was developed with the use of the Gibbs-Helmholtz relation at constant pressure and composition. This model consists of combinatorial and residual terms. The residual term is the same as that in the UNIQUAC method, but the total area fraction of molecules is introduced on account of the hole effect. The combinatorial part takes into account the free volume (FV) effect, which plays a significant role in polymer systems. The validity of this model is demonstrated by calculating the solvent activities in 36 polymer solutions in comparison with Entropic-FV (EFV) and UNIFAC-FV methods. The total average absolute deviations (AAD) from the experimental observations are 8.27, 6.38, and 1.64 for EFV, UNIFAC-FV, and the present method, respectively. It is found that the fit to these experimental data by the present model is quite good over a wide range of concentration. An estimation of the infinite dilution activity coefficients also proves the validity of the new method. (c) 2005 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| 出版者 | JOHN WILEY & SONS INC |
| 内容类型 | 期刊论文 |
| 源URL | [http://dx.doi.org/doi:10.1002/polb.20618]  |
| 专题 | 化学化工－已发表论文 |
| 推荐引用方式 GB/T 7714 | Qing Lin Liu,Liu QL,Zhen Feng Cheng. New free-volume-related activity model for polymer solutions[J],2005. |
| APA | Qing Lin Liu,刘庆林,&Zhen Feng Cheng.(2005).New free-volume-related activity model for polymer solutions.. |
| MLA | Qing Lin Liu,et al."New free-volume-related activity model for polymer solutions".(2005). |
| 个性服务 |
| 查看访问统计 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论