| MODELING THE CHAIN CONFORMATION OF POLYMER MELTS IN CONTRACTION FLOW |
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| 作者姓名： | 周持兴 |
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| 作者单位： | Department of |
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| 基金项目： | This work was supported by the research grants from the National Nature Science Foundation of China (No. 20174024) and the Special Founds for Major State Basic Research Projects (G199906408) |
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| 摘 要： | A constitutive model of quasi-Newtonian fluid based on the type of flow is used in abrupt planar contraction now.The numerical results from finite element analysis are consistent with experimental data for stress patterns and velocityprofiles in the flow field. The chain conformations of polymer melts are then investigated in such a planar contraction byusing the phenomenological model with internal parameters proposed by the author. That is, the shape and orientation ofpolymer chain coils are predicted and discussed in different flow regions of the contraction flow field that possess simpleshear flow, extensional flow, vortical flow, and mixed flow respectively.
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| 收稿时间： | 2002-02-04 |
| 修稿时间： | 2002-03-22 |
MODELING THE CHAIN CONFORMATION OF POLYMER MELTS IN CONTRACTION FLOW* |
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| Zhi-ming Liang,Wei Yu,Chi-xing Zhou,De-lu Zhao.MODELING THE CHAIN CONFORMATION OF POLYMER MELTS IN CONTRACTION FLOW[J].Chinese Journal of Polymer Science,2003,0(1):35-43. |
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| Authors: | Zhi-ming Liang Wei Yu Chi-xing Zhou De-lu Zhao |
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| Institution: | a.Department of Polymeric Materials Science & Engineering Shanghai Jiaotong University; Shanghai 200240; China b.Institute of Chemistry. The Chinese Academy of Science; Beijing 100080; China |
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| Abstract: | A constitutive model of quasi-Newtonian fluid based on the type of flow is used in abrupt planar contraction now.The numerical results from finite element analysis are consistent with experimental data for stress patterns and velocityprofiles in the flow field. The chain conformations of polymer melts are then investigated in such a planar contraction byusing the phenomenological model with internal parameters proposed by the author. That is, the shape and orientation ofpolymer chain coils are predicted and discussed in different flow regions of the contraction flow field that possess simpleshear flow, extensional flow, vortical flow, and mixed flow respectively. |
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| Keywords: | Polymer melts Chain conformation Contraction flow Modeling Computer simulation |
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