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Gel‐to‐Sol and Sol‐to‐Gel Transitions Utilizing the Interaction of α ‐Cyclodextrin with Dodecyl Side Chains Attached to a Poly(acrylic acid) Backbone
Author(s) -
Tomatsu Itsuro,
Hashidzume Akihito,
Harada Akira
Publication year - 2005
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.200500044
Subject(s) - cyclodextrin , acrylic acid , side chain , sol gel , polymer chemistry , rheology , intrinsic viscosity , polymer , viscosity , chemistry , materials science , organic chemistry , copolymer , nanotechnology , composite material
Summary: By utilizing the interaction of α ‐cyclodextrin ( α ‐CD) with dodecyl side chains in polymers of x mol‐% dodecyl‐modified poly(acrylic acid) (p(AA/C 12 ( x ))), systems that undergo gel‐to‐sol and sol‐to‐gel transitions were successfully constructed. Rheological experiments indicated that addition of α ‐CD to the hydrogel of p(AA/C 12 (5)) caused a drastic decrease in the viscosity, while addition of oligo( α ‐CD) to the solution of p(AA/C 12 (2)) led to a remarkable increase in the viscosity.Photographs for a gel‐to‐sol transition upon addition of α ‐CD to 5.0 g · L −1 p(AA/C 12 (5)).