Cyclic polymers are a type of polymers with a special topological structure.The entanglement between molecular chains of cyclic polymers are reduced for the disappearance of chain end groups.Therefore,cyclic polymers exhibit some unique properties and have broad application prospects.This article first briefly introduces the research background and significance of cyclic polymers,then classifies and evaluates the preparation techniques of cyclic polymers in recent years with examples.Finally,a brief outlook on the future development of cyclic polymers were prospected.This article can provide a reference for the research and development of new functional polymer materials.
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