Synthesis of Photo-degradable Polyamide Rotaxanes with Cinnamate Photodimer and Cyclodextrin

抄録

Molecular design to give rigidity to polymer back bones is an important concept to increase the thermal stability of polymers. We introduced a unique chemical structure, polyrotaxane, to give structural rigidity to polymer back bones using a necklace-like structure and cinnamic acid as a photo-reactive monomer to prepare a new polyamide. By utilizing this unique concept, we designed aliphatic-aromatic polyamides containing the rotaxane structure composed of 4,4’-diacetoamido-α-truxillic acid, poly (ethylene glycol) bisamine (PEGBA) and methylated-α-cyclodextrin (Me-α-CD), and observed their thermo-mechanical performance and degradation behavior under UV-irradiation. The thermal degradation temperature of the polyamides was enhanced by inclusion complex formation with Me-α-CD, and the polyamide polyrotaxane was degraded by UV-irradiation via the photocleavage of the cyclobutane ring in 4,4’-diacetoamido-α-truxillic acid.