Scheme 2 | Polymer Journal

Scheme 2

From: Cationic ring-opening copolymerization of a cyclic acetal and γ-butyrolactone: monomer sequence transformation and polymerization–depolymerization control by vacuuming or temperature changes

Scheme 2

Schematic illustration of (A) depolymerization by vacuuming and (B) depolymerization–polymerization control by temperature change. The γBL-derived chain ends (red symbols with an OH group) may be unstable due to the very low Tc of γBL, although these chain ends can be transiently generated

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