SEARCH Articles Figures Tables Acetals cyclic Cyclic acetalization Cyclic ketene Cyclic ketene acetals free radical ring opening Keten acetal Ketene acetal Ketene acetals, cyclic Ketenes acetals Ketenes, cyclic Radical Ring-Opening Polymerization (RROP) of Cyclic Ketene Acetals Radical cyclication Radical ring-opening Radical ring-opening acetal Ring opening acetal Ring radical