Depolymerization of End-of-Life Poly(bisphenol A carbonate)via Transesterification with Acetic Anhydride as Depolymerization Reagent

摘要

The chemical recycling,a combination of depolymerization and polymerization processes,of end-of-life plastics/polymers can contribute to a more sustainable,resource-conserving and environmental-benign society.In this regard,we have set up a capable procedure for the chemical recycling of the bisphenol A unit of poly(bisphenol A carbonate).In more detail,acetic acid or acetic anhydride were used as depolymerization reagent in the DMAP-catalyzed conversion of end-of-life poly(bisphenol A carbonate)to obtain bisphenol A diacetate as well-defined product.Moreover,it was demonstrated that bisphenol A diacetate in combination with diphenyl carbonate can be applied in the potassium tert-butoxide catalyzed synthesis of new poly(bisphenol A carbonate).In consequence a recycling of poly(bisphenol A carbonate)is feasible.