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Heat‐induced Supramolecular Crosslinking of Dumbbell‐shaped PEG with β‐CD Dimer Based on Reversible Loose‐fit Rotaxanation
Author(s) -
Katoono Ryo,
Kobayashi Yuichiro,
Yamaguchi Masayuki,
Yui Nobuhiko
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000548
Subject(s) - dumbbell , peg ratio , supramolecular chemistry , polymer chemistry , viscoelasticity , dimer , ethylene glycol , supramolecular polymers , viscosity , rotaxane , chain (unit) , intrinsic viscosity , chemistry , chemical engineering , materials science , polymer , crystallography , composite material , organic chemistry , crystal structure , medicine , finance , economics , physical therapy , physics , astronomy , engineering
Supramolecular crosslinking was studied in reversible loose‐fit rotaxanation between a size‐mismatched ring and a dumbbell‐shaped chain attached to bulky terminals through slipping of the crosslinked rings onto the chain using a combination of β‐cyclodextrin (β‐CD) and poly(ethylene glycol) (PEG) in water. The mixing led to a drastic increase in viscosity only at an elevated temperature, while a PEG chain without any terminals or with bulkier terminals produced no change in the mixed solution under the same conditions. The dynamic viscoelastic properties of the mixed solution of the proper dumbbell‐shaped PEG chain and β‐CD dimer in water were also investigated to indicate network formation through heat‐induced supramolecular crosslinking.