A separation method of responses from large scale motions and chain relaxations for viscoelastic properties of symmetric poly(styrene-b-2-vinylpyridine)s in the ordered state

Long Fang, Yoshiaki Takahashi, Atsushi Takano, Yushu Matsushita

研究成果: ジャーナルへの寄稿学術誌査読

4 被引用数 (Scopus)

抄録

Separation method of responses from large scale motions and polymer chain motions are investigated for viscoelastic properties of symmetric poly(styrene-b-2-vinylpyridine)s (SP) in the ordered state taking into account of the effects of flow history on the sample. Due to the almost same thermo-rheological properties of components, master curves of dynamic moduli for SP, G*SP are obtained and shown that the data well coincide with those of polystyrene homopolymers (hPS) at high frequency ω , while responses from large scale motions of lamellar structure, δG*grain are observed at low ω, which asymptote to δG*grain ~ ω0.5. After the pre-shear, magnitude ofδG*grain became lower at the lower region. When the magnitude of G*SPare appropriately higher than δG*grain extended to higher ω, δG*grainand the responses of polymer chains, δG*chain, having Rouse like modes, are successfully obtained by subtraction, δG*chain = G*SP - δG*grain, irrespective of pre-shear. By combining thus obtained δG*grain, δG*chain, and the data for hPS, G*hPS at higher ω region, G*SP data can be well approximated in a whole frequency range of the measurement.

本文言語英語
ページ(範囲)93-99
ページ数7
ジャーナルNihon Reoroji Gakkaishi
41
2
DOI
出版ステータス出版済み - 2013

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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