Primitive chain network simulations of the creep of entangled polymers
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910007046438912 |
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| author | Masubuchi, Yuichi Ianniruberto, Giovanni Marrucci, Giuseppe |
| author_facet | Masubuchi, Yuichi Ianniruberto, Giovanni Marrucci, Giuseppe |
| contents | Although the behavior of entangled polymers in startup shear flows with constant shear rates has been thoroughly investigated, the response under creep has not been frequently considered. In this study, primitive chain network simulations, based on a multi-chain sliplink model, are modified so as to describe creep experiments. Creep simulations are compared to a literature dataset of an entangled polybutadiene solution, and qualitative agreement is found in the nonlinear range, i.e., under large stresses. Simulations allow one to extract details of the transient molecular motion, and results suggest that the deformation-induced disentanglement is relatively mild in the stress-controlled mode as compared to the rate-controlled one, because coherent molecular tumbling at the start of flow is disrupted. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_01526 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Primitive chain network simulations of the creep of entangled polymers Masubuchi, Yuichi Ianniruberto, Giovanni Marrucci, Giuseppe Soft Condensed Matter Although the behavior of entangled polymers in startup shear flows with constant shear rates has been thoroughly investigated, the response under creep has not been frequently considered. In this study, primitive chain network simulations, based on a multi-chain sliplink model, are modified so as to describe creep experiments. Creep simulations are compared to a literature dataset of an entangled polybutadiene solution, and qualitative agreement is found in the nonlinear range, i.e., under large stresses. Simulations allow one to extract details of the transient molecular motion, and results suggest that the deformation-induced disentanglement is relatively mild in the stress-controlled mode as compared to the rate-controlled one, because coherent molecular tumbling at the start of flow is disrupted. |
| title | Primitive chain network simulations of the creep of entangled polymers |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2508.01526 |