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Hydrogel formation by the 'topological conversion' of cyclic PLA-PEO block copolymers
| Title: | Hydrogel formation by the 'topological conversion' of cyclic PLA-PEO block copolymers |
| Authors: | Yamamoto, Takuya Browse this author | | Inoue, Kotaro Browse this author | | Tezuka, Yasuyuki Browse this author |
| Issue Date: | Apr-2016 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Polymer journal |
| Volume: | 48 |
| Issue: | 4 |
| Start Page: | 391 |
| End Page: | 398 |
| Publisher DOI: | 10.1038/pj.2015.134 |
| Abstract: | An amphiphilic cyclic block copolymer consisting of poly(L- or D-lactide) and poly(ethylene oxide), that is, PLLA-PEO or PDLA-PEO, was synthesized from its corresponding linear triblock precursor, PLLA-PEO-PLLA or PDLA-PEO-PDLA, respectively, with alkenyl end groups. A mixture of the micellar dispersions of linear PLLA-PEO-PLLA and linear PDLA-PEO-PDLA formed a gel upon heating, whereas a mixture of the cyclic counterparts did not undergo this phase transition. These results suggest that the gelation behavior is directed by the topology of the polymer components. Furthermore, cyclic PLLA-PEO and cyclic PDLA-PEO block copolymers incorporating photocleavable o-nitrobenzyl units were synthesized. A mixture of the micellar dispersions of these block copolymers formed a gel upon ultraviolet irradiation via the 'topological conversion'. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/62896 |
| 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)
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Submitter: 山本 拓矢
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