State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
limaoyuan@hust.edu.cn (M.Y.L.)
marblezy@hust.edu.cn (Y.Z.)
收稿:2021-04-25,
修回:2021-5-7,
录用:2021-5-11,
网络首发:2021-07-23,
纸质出版:2021-10-18
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Yu, W. J.; Shen, G. C.; Zhou, X. W.; Li, M. Y.; Zhang, Y.; Zhou, H. M.; Li, D. Q. A constitutive model describing molecular configuration evolution and transient rheological behavior of entangled polymer solutions. Chinese J. Polym. Sci. 2021, 39, 1680–1694
Wen-Jie Yu, Guan-Cheng Shen, Xiao-Wei Zhou, et al. A Constitutive Model Describing Molecular Configuration Evolution and Transient Rheological Behavior of Entangled Polymer Solutions[J]. Chinese Journal of Polymer Science, 2021, 39(12): 1680-1694.
Yu, W. J.; Shen, G. C.; Zhou, X. W.; Li, M. Y.; Zhang, Y.; Zhou, H. M.; Li, D. Q. A constitutive model describing molecular configuration evolution and transient rheological behavior of entangled polymer solutions. Chinese J. Polym. Sci. 2021, 39, 1680–1694 DOI: 10.1007/s10118-021-2606-z.
Wen-Jie Yu, Guan-Cheng Shen, Xiao-Wei Zhou, et al. A Constitutive Model Describing Molecular Configuration Evolution and Transient Rheological Behavior of Entangled Polymer Solutions[J]. Chinese Journal of Polymer Science, 2021, 39(12): 1680-1694. DOI: 10.1007/s10118-021-2606-z.
Entanglement network is an important structural feature in concentrated polymer solutions and polymer melts
which has a great influence on the transient rheological behavior and molecular configuration evolution. However
the existing constitutive models have limitations in describing the influence of dynamic entanglement behavior on molecular chain motion
resulting in inaccurate descriptions of the transient rheological behavior. Thus
a molecular configuration evolution model for polymer solutions considering the dynamic entanglement effect is proposed by introducing an intermolecular force that changes with the orientation of the molecular chain in this work. The intermolecular force is introduced by considering the friction coefficient as anisotropic
and the orientation effect is considered by introducing an excluded volume dependent anisotropic diffusion. The proposed model can better describe the stress relaxation
stress growth
and dielectric anisotropy of polymer solutions compared with the anisotropy FENE model and FENE model. In addition
the influence of different model parameters on the transient and steady shear response of polymer solution is investigated
and the results show that the influence of volume loss on the friction anisotropy factor
k
σ
increases as the solution concentration increases.
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