title: A high-efficiency strategy for synthesizing cyclic polymers of methacryates in one pot.
abstract: An unprecedented strategy for the high-efficiency preparation of the cyclic polymers is developed. In this strategy, the atom transfer radical polymerization, the substitution of chain-end halide by azide group and Cu-catalyzed alkyne-azide cyclization, i.e., the frequently used three separated steps for the preparation of cyclic polymers, are integrated into a one-pot reaction by the introduction of a "regulator". The kernel of this novel strategy is the utilization of the different rates between the competitive ATRP propagation and SN 2 substitution of a tertiary-carbon halogen and secondary-carbon halogen. 0.55 g (yield = 59%) cyclic poly(methyl methacrylate) is obtained from 3.0 mL reaction solution. This work proposed a high-efficiency and bright promising strategy for the preparation of cyclic polymer, which would evoke more research interests on cyclic polymer.
authors.affiliation: Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou Industrial Park, Suzhou 215123, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Zhu
authors.forename: Nianchen
authors.initials: N
authors.lastname: Zhou
authors.forename: Jian
authors.initials: J
authors.lastname: Zhu
authors.forename: Zhengbiao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Zhenping
authors.initials: Z
authors.lastname: Cheng
authors.forename: Yingfeng
authors.initials: Y
authors.lastname: Tu
authors.forename: Xiulin
authors.initials: X
authors.lastname: Zhu
mesh_terms: D060326:Chemistry Techniques, Synthetic / Q000379:methods*; D003500:Cyclization; D008689:Methacrylates / Q000737:chemistry; D015394:Molecular Structure; D058105:Polymerization; D019904:Polymethyl Methacrylate / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D008689:Methacrylates; D019904:Polymethyl Methacrylate