Thinning approximation for two-dimensional scattering patterns from coarse-grained polymer melts under shear flow

Katsumi Hagita, Takahiro Murashima, Hiroshi Takano, Toshihiro Kawakatsu

研究成果: Article

5 引用 (Scopus)

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We proposed a thinning approximation (TA) for estimation of the two-dimensional (2D) wide-angle scattering patterns from Kremer-Grest polymer melts under shear. In the TA, extra particles are inserted at the middle of bonds for fine-graining of the coarse-grained polymers. For the case without the TA, spots corresponding to the orientation of bonds at a high shear rate are difficult to observe because the bond length of successive particles is comparable to the distance between neighboring particles. With the insertion of the extra particles, a ring pattern originating from the neighboring particles can be moved to a wide-angle region. Thus, we can observe the spots at high shear rates. We also examined the relationship between 2D scattering patterns and the Weissenberg number, which is defined as the product of the shear rate and the longest relaxation time. It is confirmed that the relationship for coarse-grained polymers with the TA is consistent with that of the all-atomistic model of polyethylene.

元の言語English
記事番号124803
ジャーナルJournal of the Physical Society of Japan
86
発行部数12
DOI
出版物ステータスPublished - 2017 12 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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