MALDI-TOF-MS plays important roles in the characterization of various synthetic polymers, which can provide the molecular weight, repeat unit, end groups, polymerization mechanism and other information on the analyte polymers.

Chemoselective polymerization from a mixture of l-LA, CHO and CO₂ enables the synthesis of PLLA, PCHC or PCHC-b-PLLA achieved by PBB-Br. The chemoselectivity depends on the nature of the growing polymer chain end.

Functional P(MVL- co -CL) copolyesters with modifiable pendent double bonds were obtained by chemoselective and controlled ring-opening copolymerization of biorenewable MVL with CL using an organophosphazene/urea binary catalyst.