Topology and Sequence-Dependent Micellization and Phase Separation of Pluronic L35, L64, 10R5, and 17R4 : Effects of Cyclization and the Chain Ends

Watanabe, Tomohisa; Wang, Yubo; Ono, Tomoko et al.

Polymers, 2022, 14(9), 1823

Permalink : https://hdl.handle.net/2115/86111

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https://doi.org/10.3390/polym14091823      

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アクセス権
metadata only access
URI
https://hdl.handle.net/2115/86111
タイトル
Topology and Sequence-Dependent Micellization and Phase Separation of Pluronic L35, L64, 10R5, and 17R4 : Effects of Cyclization and the Chain Ends
著者
Watanabe, Tomohisa ; Wang, Yubo ; Ono, Tomoko ; Chimura, Satoru ; Isono, Takuya ; Tajima, Kenji ; Satoh, Toshifumi ; Sato, Shin-ichiro ; Ida, Daichi ; Yamamoto, Takuya
著者名
Watanabe, Tomohisa
著者名
Wang, Yubo
著者名
Ono, Tomoko
著者名
Chimura, Satoru
著者名
Isono, Takuya
著者名
Tajima, Kenji
著者名
Satoh, Toshifumi
著者名
Sato, Shin-ichiro
著者名
Ida, Daichi
e-Rad_Researcher
30525986
著者名
Yamamoto, Takuya
言語
英語
キーワード
cyclic polymer
block copolymer
Pluronic
micellization
cloud point
phase transition
発行日
2022-05
出版者
MDPI
収録物名
Polymers
巻(号)
14(9)
ページ
1823
抄録
The topology effects of cyclization on thermal phase transition behaviors were investigated for a series of amphiphilic Pluronic copolymers of both hydrophilic-hydrophobic-hydrophilic and hydrophobic-hydrophilic-hydrophobic block sequences. The dye solubilization measurements revealed the lowered critical micelle temperatures (T-CMT) along with the decreased micellization enthalpy (Delta H-mic) and entropy (Delta S-mic) for the cyclized species. Furthermore, the transmittance and dynamic light scattering (DLS) measurements indicated a block sequence-dependent effect on the clouding phenomena, where a profound decrease in cloud point (T-c) was only found for the copolymers with a hydrophilic-hydrophobic-hydrophilic block sequence. Thus, the effect of cyclization on these critical temperatures was manifested differently depending on its block sequence. Finally, a comparison of the linear hydroxy-terminated, methoxy-terminated, and cyclized species indicated the effect of cyclization to be unique from a simple elimination of the terminal hydrophilic moieties.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
Creative Commons Attribution 4.0 International
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.3390/polym14091823