TY - CONF
T1 - Dynamic light scattering study on sliding mode of polyrotaxane solutions and slide-ring gels
AU - Okumura, Yasushi
AU - Miyazaki, Sho
AU - Zhao, Changming
AU - Kidowaki, Masatoshi
AU - Karino, Takeshi
AU - Shibayama, Mitsuhiro
AU - Ito, Kohzo
PY - 2006/12/1
Y1 - 2006/12/1
N2 - We have reported the slide-ring gel (topological gel) synthesized using the polyrotaxane which consists of α-cyclodextrin and polyethylene glycol and have reported various physical properties. We have observed the polyrotaxane dissolved in sodium hydroxide aqueous solution using the dynamic-light- scattering method. In addition to the cooperative and translational modes observed in the usual polymer solutions, we found out the new kind of diffusion mode. Furthermore, we reported that this mode originated in sliding movement of cyclodextrin molecules on PEG chains. We call this mode "sliding mode". But, its mechanism was not known. We have improved the solubility of polyrotaxane by introducing hydroxypropyl groups to hydroxyl groups of cyclodextrin. We call it hydroxypropyl polyrotaxane (h-APR). In this study, we report cooperative, translational, and sliding mode as functions of concentration, scattering angle and temperature. We conclude that the sliding mode is cooperative diffusion mode based on sliding and colliding of cyclodextrin molecules on flexible random PEG network.
AB - We have reported the slide-ring gel (topological gel) synthesized using the polyrotaxane which consists of α-cyclodextrin and polyethylene glycol and have reported various physical properties. We have observed the polyrotaxane dissolved in sodium hydroxide aqueous solution using the dynamic-light- scattering method. In addition to the cooperative and translational modes observed in the usual polymer solutions, we found out the new kind of diffusion mode. Furthermore, we reported that this mode originated in sliding movement of cyclodextrin molecules on PEG chains. We call this mode "sliding mode". But, its mechanism was not known. We have improved the solubility of polyrotaxane by introducing hydroxypropyl groups to hydroxyl groups of cyclodextrin. We call it hydroxypropyl polyrotaxane (h-APR). In this study, we report cooperative, translational, and sliding mode as functions of concentration, scattering angle and temperature. We conclude that the sliding mode is cooperative diffusion mode based on sliding and colliding of cyclodextrin molecules on flexible random PEG network.
KW - Dynamic light scattering
KW - Quasi-elastic light scattering
KW - Slide-Ring gel (SR gel)
KW - Topological gel
UR - http://www.scopus.com/inward/record.url?scp=33846136070&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846136070&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:33846136070
SP - 3099
EP - 3100
T2 - 55th Society of Polymer Science Japan Symposium on Macromolecules
Y2 - 20 September 2006 through 22 September 2006
ER -