Volume Phase Transitions of Slide-Ring Gels
AbstractThe volume phase transition of slide-ring gels with freely-movable cross-linking junctions was investigated. Ionic chemical gels with fixed cross-linking junctions undergo volume phase transitions when they have higher than the critical degree of ionization. However, the experimentally-observed critical ionization value for slide-ring gels is much higher than theoretical values for chemical gels. This difference indicates that the volume phase transition is significantly suppressed in slide-ring gels. The mesoscale structure at various swollen or shrunken states was also investigated by small angle X-ray scattering. Changes in the scattering patterns with shrinking slide-ring gels suggest microphase separation due to the sliding of cyclic molecules threaded along the axis of the polymer chains, which may suppress the volume phase transition. In addition, slide-ring gels absorbed/desorbed greater than equilibrium volumes in the shrinking/swelling processes and showed slow dynamics; these observations are also related to their sliding properties. View Full-Text
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Bando, A.; Kasahara, R.; Kayashima, K.; Okumura, Y.; Kato, K.; Sakai, Y.; Yokoyama, H.; Shinohara, Y.; Amemiya, Y.; Ito, K. Volume Phase Transitions of Slide-Ring Gels. Polymers 2016, 8, 217.
Bando A, Kasahara R, Kayashima K, Okumura Y, Kato K, Sakai Y, Yokoyama H, Shinohara Y, Amemiya Y, Ito K. Volume Phase Transitions of Slide-Ring Gels. Polymers. 2016; 8(6):217.Chicago/Turabian Style
Bando, Akinori; Kasahara, Rumiko; Kayashima, Kentaro; Okumura, Yasushi; Kato, Kazuaki; Sakai, Yasuhiro; Yokoyama, Hideaki; Shinohara, Yuya; Amemiya, Yoshiyuki; Ito, Kohzo. 2016. "Volume Phase Transitions of Slide-Ring Gels." Polymers 8, no. 6: 217.
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