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Catenane Crosslinked Mechanically Adaptive Polymer Gel
Author(s) -
Xing Hao,
Li Zhengtao,
Wu Zi Liang,
Huang Feihe
Publication year - 2018
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201700361
Subject(s) - catenane , ethylene glycol , polymer , click chemistry , hydrogen bond , materials science , polymer chemistry , derivative (finance) , chemical engineering , chemistry , molecule , organic chemistry , composite material , financial economics , engineering , economics
A new strategy is introduced to prepare an adaptive polymer gel that has a unique adaptability in response to environmental stimuli. This gel is prepared by the thiol‐ene “click” reaction between a bisvinyl [2]catenane and a poly(ethylene glycol) derivative containing multiple thiol groups. The catenane crosslinker is responsive to external stimuli due to the existence of intercomponent hydrogen bonding (IHB). The strong IHB restricts the rotation and movement of the crosslinker, giving it a rigid feature; however, the crosslinker becomes flexible when the IHB is destroyed. In consequence, the resulting gel can be reversibly switched between tough and soft states under stimulations.