Viscoelasticity and 3D-TEM observation of gyroid-forming Styrene-Butadiene diblock copolymer melts

Hiroshi Okumura, Masaoki Takahashi, Wakana Miyoshp, Hiroshi Jinnai, Shigeru Suzuki

Research output: Contribution to conferencePaperpeer-review


Viscoelastic properties of Styrene-Butadiene diblock copolymer melts with an order-order transition (Cylinder to Gyroid) were investigated and the microphase separated structures were observed by 3D-TEM. TOOT (order-order transition temperature) is around 160°C. Gyroid-forming sample shows regular gyroid structure after annealing at T=TOOT and T=TOOT +40, and a clear plateau appears in G (Gcubic). In this study, the correlation between structural parameter and Gcubic is discussed based on 3D-TEM observation. As a result, the number of molecules in interface is thought to be the factor that contributes to Gcubic according to the mean field consideration.

Original languageEnglish
Number of pages1
Publication statusPublished - 2006 Oct 18
Externally publishedYes
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: 2006 May 242006 May 26


Other55th SPSJ Annual Meeting


  • Block copolymer
  • Gyroid
  • Transmission electron microtomography
  • Viscoelasticity

ASJC Scopus subject areas

  • Engineering(all)


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