Relaxation of entangled polymers under fast flow
| Project/Area Number |
23350113
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Polymer/Textile materials
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Hiroshi 京都大学, 化学研究所, 教授 (90167164)
MATSUMIYA Yumi 京都大学, 化学研究所, 助教 (00378853)
UNEYAMA Takashi 京都大学, 化学研究所, 助教 (10524720)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000)
Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2012: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2011: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Keywords | 高分子 / レオロジー / 誘電緩和 / シミュレーション / ダイナミクス / モデリング / 粘弾性 / からみあい / 粗視化モデル / 大変形 / 非線形粘弾性 / 粘弾性緩和 |
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| Research Abstract |
In this study we focused on polymer dynamics under fast flow. We performed viscoelastic and dielectric measurements under fast flow. By particle tracking velocimetry, we confirmed that the dielectric relaxation is not accelerated under fast uniform shear field. To explain this result, we constructed a semi-phenomenological dumbbell model with non-isotropic, flow-rate dependent friction constant for polymer. The flow-rate dependence of the friction was extracted from experimental data for stress relaxation after cessation of fast elongational flows. We implemented the flow-rate dependent friction into a molecular model that is able to semi-quantitatively predict viscoelasticity of polymers under fast flows.
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Report
(4 results)
Research Products
(52 results)
