2012 年 70 巻 5 号 p. 517-523
Slide-ring materials, in which the cross-links are slidable on the backbone polymers, have advanced by many fundamental and applied studies since the first report in 2001. Over the past decade, almost all studies have concentrated on a uniform-backbone material for reasons of the availability. This article reviews our recent progress related to the materials with diverse backbones. Organic-inorganic hybrid slide-ring materials are synthesized from a polyrotaxane that consists of poly(dimethylsiloxane) and γ-cyclodextrin. The slidability of cross-links in the material promises dynamic changes in the relative positions of each component. Poly(butadiene)-based slide-ring materials enable us to find a novel viscoelastic relaxation attributed to the sliding dynamics of partial chains through cross-links. This suggests a dynamic transition between one state where the cross-links behave as fixed ones and another where they slide freely. The diversifying physical property and application are beginning to reveal universal phenomena and strategies of molecular designs in slide-ring materials.