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Thermally switchable polyrotaxane as a model of stimuli‐responsive supramolecules for nano‐scale devices
Author(s) -
Fujita Hiroaki,
Ooya Tooru,
Kurisawa Motoichi,
Mori Hideharu,
Terano Minoru,
Yui Nobuhiko
Publication year - 1996
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.1996.030170803
Subject(s) - copolymer , ethylene glycol , materials science , nanoscopic scale , peg ratio , polymer chemistry , nano , intermolecular force , chemical engineering , nanotechnology , polymer , chemistry , molecule , organic chemistry , composite material , finance , engineering , economics
A polyrotaxane consisting of many β‐cyclodextrins (β‐CDs) and a triblock copolymer of poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG) capped with bulky end‐groups was synthesized as a model of stimuli‐responsive supramolecules for nanoscale devices. The polyrotaxane was reversibly soluble‐insoluble in water in response to temperature. This was achieved through the assembled and dispersed states of β‐CDs along the block copolymer. It is considered that intermolecular hydrogen bondings of β‐CDs, as well as the PEG segment length of the copoloymer, are predominant factors for regulating such thermally switchable behavior of the polyrotaxane.