Crystalline Polyesters from CO2 and 2-Butyne via α-Methylene-β-butyrolactone Intermediate

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• 作者：Yue-Chao Xu ; Hui Zhou ; Xing-Yu Sun ; Wei-Min Ren ; Xiao-Bing Lu
• 刊名：Macromolecules
• 出版年：2016
• 出版时间：August 23, 2016
• 年：2016
• 卷：49
• 期：16
• 页码：5782-5787
• 全文大小：395K
• 年卷期：0
• ISSN：1520-5835

文摘

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 α-methylene-β-butyrolactone (M_βBL) intermediate. Subsequent ring-opening polymerization of the lactone intermediate mediated by achiral Salen aluminum complexes afforded syndiotactic-enriched polyesters with controllable molecular weight and narrow polydispersity. Notably, the resultant syndiotactic-enriched poly(M_βBL) is a typical semicrystalline material. The present method provides access to a new class of CO₂-based crystalline polymeric materials.