Nucleation in polydisperse polymer mixtures
文献类型：期刊论文
| 作者 | Qi, Shuanhu; Yan, Dadong |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2008-11-28 |
| 卷号 | 129期号:20 |
| 关键词 | Free Energy Nucleation Polymers Scf Calculations |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/1.3020355 |
| 英文摘要 | The effect of polydispersity on nucleation in a metastable mixture of polydisperse polymer A and monodisperse polymer B is studied using self-consistent field theory. We adopt the continuous Schulz chain length distribution to describe the polydispersity of species A. The results show that the free energy barrier, as well as many other properties of the critical nucleus, is sensitive to the polydispersity, especially in the highly polydisperse case. This should be attributed to the fact that longer chains have stronger tendencies toward nucleation. As a result, the distribution of the volume fraction as a function of chain length in the nucleus becomes different from that in the bulk. The chain length, which corresponds to the maximum contribution to the volume fraction in the nucleus, becomes larger than the number-average chain length. Meanwhile, the interface between the critical nucleus and the parent metastable bulk phase broadens. This phenomenon is obvious when the polydispersity is high. |
| 语种 | 英语 |
| WOS记录号 | WOS:000262607100034 |
| 出版者 | AMER INST PHYSICS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/65621]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Qi, Shuanhu |
| 作者单位 | Chinese Acad Sci, BNLMS, Joint Lab Polymer Sci & Mat Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Shuanhu,Yan, Dadong. Nucleation in polydisperse polymer mixtures[J]. JOURNAL OF CHEMICAL PHYSICS,2008,129(20). |
| APA | Qi, Shuanhu,&Yan, Dadong.(2008).Nucleation in polydisperse polymer mixtures.JOURNAL OF CHEMICAL PHYSICS,129(20). |
| MLA | Qi, Shuanhu,et al."Nucleation in polydisperse polymer mixtures".JOURNAL OF CHEMICAL PHYSICS 129.20(2008). |
入库方式： OAI收割
来源：化学研究所
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