Synthesis and reorganization of dynamic covalent polymers with autonomously exchangeable covalent bonds were demonstrated. In the present paper, we focused on the central C-C bonds in diarylbibenzofuranone (DABBF) derivatives, which are prepared by dimerization of the corresponding arylbenzofuranone derivatives. The C-C bonds can be cleaved homogenously into relatively stable radicals under mild conditions; therefore, DABBF units can be expected to act as a exchangeable units. We carried out a model exchange reaction using DABBF derivatives and also synthesized polyester and polyurethane with DABBF units in the main chain by polycondensation of DABBF-diol and adipoyl dichloride and by polyaddition of DABBF-diol and diisocyanate. The molecular weights of the DABBF-containing polymers strongly dependent on the concentration of the solutions. Autonomous molecular weight change and scrambling of the polymers were confirmed.

Dynamic covalent polymers with autonomous exchangeability and reorganizability at ambient temperature

247th National Meeting (2014)

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