title: Effect of Component Mobility on the Properties of Macromolecular [2]Rotaxanes.
abstract: Macromolecular [2]rotaxanes comprising a polymer axle and crown ether wheel were synthesized to evaluate the effect of component mobility on the properties of the axle polymer, especially its crystallinity. Living ring-opening polymerization of δ-valerolactone with a pseudorotaxane initiator with a hydroxy group at the axle terminus was followed by end-capping with a bulky isocyanate. This yielded macromolecular [2]rotaxanes (M2Rs) possessing polyester axles of varying molecular weights. The crystallinity of the axle polymers of two series of M2Rs, with either fixed and movable components, was evaluated by differential scanning calorimetry. The results revealed that the effect of component mobility was significant in the fixed and movable M2Rs with a certain axle length, thus suggesting that the properties of the axle polymer depend on the mobility of the polyrotaxane components.
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.|ACT-C, Japan Science and Technology Agency (JST), 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Aoki
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.|ACT-C, Japan Science and Technology Agency (JST), 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Uchida
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Marubayashi
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.
authors.forename: Shuichi
authors.initials: S
authors.lastname: Nojima
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan. ttakata@polymer.titech.ac.jp.|ACT-C, Japan Science and Technology Agency (JST), 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan. ttakata@polymer.titech.ac.jp.
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Takata
keywords: macromolecular [2]rotaxanes; polymers; ring-opening polymerization; rotaxanes; supramolecular chemistry