| アイテムタイプ |
itemtype_ver1(1) |
| 公開日 |
2025-10-31 |
| タイトル |
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タイトル |
Primitive chain network simulations of double peaks in viscosity growth curves of densely branched pom-pom polymer melts in fast shear flows |
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言語 |
en |
| 著者 |
Masubuchi, Yuichi
Schußmann, Max G.
Hyun, Kyu
Wilhelm, Manfred
Hirschberg, Valerian
Ianniruberto, Giovanni
Marrucci, Giuseppe
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| アクセス権 |
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アクセス権 |
embargoed access |
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アクセス権URI |
http://purl.org/coar/access_right/c_f1cf |
| 権利 |
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権利情報 |
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s00397-025-01502-1 |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
Despite many attempts, the molecular mechanism of the nonlinear viscoelastic response of polymeric liquids in fast shear flows has not yet been fully elucidated. In this study, we examined the viscosity growth curves for a few well-characterized, nearly monodisperse, densely branched pom-pom polystyrene melts. The viscosity growth curves exhibit double peaks rather than the widely reported (for most polymer melts) single peak. To investigate the underlying molecular mechanism responsible for the observed behavior, we conducted primitive chain network (multi-chain sliplink) simulations, and found that the first and second peaks correspond to arm orientation and backbone stretch, respectively. We further observed that backbone stretch is reduced by coherent molecular tumbling at the flow start-up, and hence the second peak intensity comes out comparable to that of the orientation-induced first peak. In our sample, the number of backbone entanglements is small, so the mechanism of branchpoint withdrawal does not play a significant role. |
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言語 |
en |
| 出版者 |
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出版者 |
Springer |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1007/s00397-025-01502-1 |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
0035-4511 |
| 書誌情報 |
en : Rheologica Acta
巻 64,
号 6-7,
p. 263-271,
発行日 2025-07
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| ファイル公開日 |
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日付 |
2026-07-01 |
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日付タイプ |
Available |
NU_open_access.pdf (3.9 MB)
