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2016•Chemistry LettersRequires access

Self-assembled Structure of Polyrotaxane Consisting of β-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Triblock Copolymer in Bulk System

Shuntaro Uenuma, Rina Maeda, Shoko Takahashi, Kazuaki Kato, Hideaki Yokoyama, Kohzo Ito

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Abstract

Abstract Polyrotaxanes consisting of β-cyclodextrin (β-CD) and poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer end-capped with bulky trityl groups were synthesized for the first time. Self-assembled structures of the bulk sample cast from water and dimethyl sulfoxide (DMSO) based on the crystal structure of β-CD molecules and triblock copolymer microphase separation were investigated using small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD). It was found that microphase-separated structures of a different periodic distance were formed depending on the casting solvent.

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What this paper is about

Abstract Polyrotaxanes consisting of β-cyclodextrin (β-CD) and poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer end-capped with bulky trityl groups were synthesized for the first time. Self-assembled structures of the bulk sample cast from water and dimethyl sulfoxide (DMSO) based on the crystal structure of β-CD molecules and triblock copolymer microphase separation were investigated using small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD). It was found that microphase-separated structures of a different periodic distance were formed depending on the casting solvent.

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Available abstract

Abstract Polyrotaxanes consisting of β-cyclodextrin (β-CD) and poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer end-capped with bulky trityl groups were synthesized for the first time. Self-assembled structures of the bulk sample cast from water and dimethyl sulfoxide (DMSO) based on the crystal structure of β-CD molecules and triblock copolymer microphase separation were investigated using small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD). It was found that microphase-separated structures of a different periodic distance were formed depending on the casting solvent.

Key concepts: Copolymer, Ethylene oxide, Propylene oxide, Oxide, Chemistry, Poly ethylene, Polymer chemistry, Block (permutation group theory)

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Self-assembled Structure of Polyrotaxane Consisting of β-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Triblock Copolymer in Bulk System — Research Paper | ScholarLens