An effective synthetic method for the transformable polymer was developed by the introduction of a rotaxane structure into the polymer system. The interaction between a sec-ammonium and a dibenzo-24-crown-8-ether was the key for the synthesis of mechanically linked poly(δ-valerolactone) without desllipage of wheel component during the polymerization. After the acetylation of the ammonium moiety, the crown ether having a polymer chain was able to move along the axle polymer to reach the urethane linkage at the ω-end in a non-polar solvent.
- Daisuke Aoki
- Satoshi Uchida
- Toshikazu Takata
