|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Topology and Sequence-Dependent Micellization and Phase Separation of Pluronic L35, L64, 10R5, and 17R4 : Effects of Cyclization and the Chain Ends
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | Topology and Sequence-Dependent Micellization and Phase Separation of Pluronic L35, L64, 10R5, and 17R4 : Effects of Cyclization and the Chain Ends |
| Authors: | Watanabe, Tomohisa Browse this author | | Wang, Yubo Browse this author | | Ono, Tomoko Browse this author | | Chimura, Satoru Browse this author | | Isono, Takuya Browse this author | | Tajima, Kenji Browse this author | | Satoh, Toshifumi Browse this author | | Sato, Shin-ichiro Browse this author | | Ida, Daichi Browse this author | | Yamamoto, Takuya Browse this author →KAKEN DB |
| Keywords: | cyclic polymer | | block copolymer | | Pluronic | | micellization | | cloud point | | phase transition |
| Issue Date: | May-2022 |
| Publisher: | MDPI |
| Journal Title: | Polymers |
| Volume: | 14 |
| Issue: | 9 |
| Start Page: | 1823 |
| Publisher DOI: | 10.3390/polym14091823 |
| Abstract: | 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. |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/86111 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
|
