Frank-Kasper σ phase in polybutadiene-poly( -caprolactone) diblock copolymer/polybutadiene blends

Microphase-separated structures in a polybutadiene-poly( -caprolactone) diblock copolymer (PB-PCL)/polybutadiene homopolymer (PB) blend were investigated by small-angle x-ray scattering (SAXS). Non-equilibrium spherical micelles were observed at temperatures ranging between 60 and 100 °C. An SAXS pr...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2017-05, Vol.29 (20), p.204002-204002
Main Authors: Takagi, Hideaki, Hashimoto, Ryo, Igarashi, Noriyuki, Kishimoto, Shunji, Yamamoto, Katsuhiro
Format: Article
Language:English
Subjects:
block copolymer
Frank-Kasper
microphase-separated structure
phase
self-assembly
small angle x-ray scattering
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Summary:Microphase-separated structures in a polybutadiene-poly( -caprolactone) diblock copolymer (PB-PCL)/polybutadiene homopolymer (PB) blend were investigated by small-angle x-ray scattering (SAXS). Non-equilibrium spherical micelles were observed at temperatures ranging between 60 and 100 °C. An SAXS profile with  >60 scattering peaks was recorded at 140 °C. All the peak positions were in good agreement with theoretical Frank-Kasper σ phase peak positions. Thus, these results indicate the formation of a Frank-Kasper σ phase in the PB-PCL/PB blend at 140 °C.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/aa6908