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论文类型：期刊论文

发表时间：2016-08-23

发表刊物：MACROMOLECULES

收录刊物：SCIE、EI、Scopus

卷号：49

期号：16

页面范围：5782-5787

ISSN号：0024-9297

摘要：The selective transformation of carbon dioxide into useful chemicals has attracted much attention in recent decades due to the economic and environmental benefits arising from the utilization of renewable source. Nevertheless, the reactions on incorporating CO2 into polymeric materials are very limited. The copolymerization of CO2 and alkynes to synthesize degradable polyesters is a thermodynamically unfavorable process, since the propagation step involving CO2 is a major obstacle. Herein, we report a strategy to conquer the thermodynamic and kinetic barriers for the copolymerization of CO2 and 2-butyne via alpha-methylene-beta-butyrolactone (M beta BL) intermediate. Subsequent ring-opening polymerization of the lactone intermediate mediated by achiral Salen aluminum complexes afforded syndiotacticenriched polyesters with controllable molecular weight and narrow polydispersity. Notably, the resultant syndiotactic-enriched poly(M beta BL) is a typical semicrystalline material. The present method provides access to a new class of CO2-based crystalline polymeric materials.