Closed-loop chemical recycling of polymers to their constituent monomers and subsequent repolymerization is a promising strategy for plastic recycling. Within this field, aliphatic polyesters and polycarbonates are often highlighted, and the thermodynamics that describe the ring-opening polymerization (ROP) equilibria have become a common metric to assess their chemical recyclability. The ring-chain equilibria (RCE) extend the recyclability of polymers further than described by ROP, by including