Probing relationship between structure and viscosity of unentangled polymers in steady shear flow
文献类型：期刊论文
| 作者 | Xu, Xiaolei; Chen, Jizhong; An, Lijia |
| 刊名 | SCIENCE CHINA-CHEMISTRY
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 60期号:12页码:1609-1616 |
| 关键词 | Molecular Dynamics Simulation Polymer Shear Flow Viscosity |
| ISSN号 | 1674-7291 |
| DOI | 10.1007/s11426-017-9129-3 |
| 英文摘要 | Structural responses of unentangled polymers of various architectures, including linear, ring, star, asymmetric star, and H-shaped polymers, in steady shear flow are investigated via nonequilibrium molecular dynamics simulations. As observed in our previous simulations, these polymers, when having an identical equilibrium mean-square radius of gyration < R (2) (g0)> exhibit the same viscosity curve in both the linear and nonlinear regimes. In this article, the polymer orientation and deformation and the rate of deformation are calculated as a function of shear rate. The differences between different architectures in most of these properties are found to be related to the polymer extensibility, the number of free ends and the ability of folding. The unique architecture-independent quantity is the gradient component < G (yy) > of the radius of gyration tensor. We find that a simple relation eta=C (eta) < R (2) (g0)>(3 < G (yy) >/< R (2) (g0)>)(3/2) gives a near-perfect fit to shear viscosity eta data, where C (eta) is a constant. The results suggest that this relation between chain thickness and viscosity is universal for unentangled polymers of various architectures. |
| 语种 | 英语 |
| WOS记录号 | WOS:000417935600019 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/45349]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Jizhong |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Xiaolei,Chen, Jizhong,An, Lijia. Probing relationship between structure and viscosity of unentangled polymers in steady shear flow[J]. SCIENCE CHINA-CHEMISTRY,2017,60(12):1609-1616. |
| APA | Xu, Xiaolei,Chen, Jizhong,&An, Lijia.(2017).Probing relationship between structure and viscosity of unentangled polymers in steady shear flow.SCIENCE CHINA-CHEMISTRY,60(12),1609-1616. |
| MLA | Xu, Xiaolei,et al."Probing relationship between structure and viscosity of unentangled polymers in steady shear flow".SCIENCE CHINA-CHEMISTRY 60.12(2017):1609-1616. |
入库方式： OAI收割
来源：化学研究所
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