Lamellar orientation of diblock copolymer solutions under steady shear flow

Shinichi Kitade, Nobuo Ochiai, Yoshiaki Takahashi, Ichiro Noda, Yushu Matsushita, Alamgir Karim, Alan I. Nakatani, Hongdoo Kim, Charles C. Han

研究成果: Contribution to journalArticle査読

23 被引用数 (Scopus)

抄録

The steady shear rate dependence of the structure of two poly(styrene-d8-b-2-vinylpyridine)s in α-chloronaphthalene, a common good solvent, was measured by small-angle neutron scattering (SANS) in a couette flow cell geometry in the ordered state, in which the solutions assume a lamellar structure (randomly oriented grains). SANS measurements revealed that steady shear flow induces macroscopic lamellar orientation at certain characteristic shear rates for the higher molecular weight sample (Mw = 3.6 × 105). Lamellar normals are preferentially oriented along the vorticity direction at high shear rates. However, no shear effect was observed for the low molecular weight sample (Mw = 2.0 × 105).

本文言語英語
ページ(範囲)8083-8090
ページ数8
ジャーナルMacromolecules
31
23
DOI
出版ステータス出版済み - 11 17 1998
外部発表はい

All Science Journal Classification (ASJC) codes

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

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