“…Five- and six-membered cylic carbonate monomers have been polymerized via ROP. , The polymerization of five-membered cyclic carbonate usually is associated with extensive decarboxylation resulting in undesirable ether linkages . The polymerization of six-membered cyclic carbonate and its derivatives proceeds with minimal decarboxylation in the polymer chain, and therefore, they are the most studied and have been polymerized by anionic, cationic, and enzymatic catalysts. − Although aliphatic ROP of larger ring size carbonates have been demonstrated in the literature, , there are only a few examples of polymerization of a seven-membered cyclic carbonates. The most studied seven-membered cyclic carbonate monomer, 1,3-dioxepan-2-one (7CC), has been polymerized by both anionic and cationic catalysts. , The interest in the seven-membered cyclic carbonate stems from its higher polymerizability compared to smaller size ring carbonates. ,, Many copolymers of 7CC have been synthesized such as poly(7CC-co-δ-VL), poly(7CC-co-ϵ-CL), and poly(TOX-co-7CC-OTM) …”