Effect of Component Mobility on the Properties of Macromolecular [2]Rotaxanes |
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| Authors: | Zhen Chen Dr. Daisuke Aoki Dr. Satoshi Uchida Dr. Hironori Marubayashi Prof. Dr. Shuichi Nojima Prof. Dr. Toshikazu Takata |
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| Affiliation: | 1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan;2. ACT-C, Japan Science and Technology Agency (JST), Meguro-ku, Tokyo, Japan |
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| 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. |
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| Keywords: | macromolecular [2]rotaxanes polymers ring-opening polymerization rotaxanes supramolecular chemistry |
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