多功能单分子催化丙交酯开环聚合和共聚合

打开文本图片集

中图分类号：063文献标志码：A

Multifunctional Single-Molecule Catalysts for Ring-Opening Polymerization and Copolymerization of Lactide

FENG Ximin, GENG Xiaowei, ZHANG Chengjian, ZHANG Xinghong (State Key Laboratory ofBiobased TransportationFuel Technology,DepartmentofPolymer Science and Engineering, Zhejiang University,Hangzhou 310o58,China）

Abstract:Polylacticacid (PLA）and its copolymers represent a critical direction in the development of sustainable polymeric materials.Inrecent years,a novel classof single-molecule multifunctionalcatalysts has emerged inthe fieldof PLA synthesis.Thesecatalysts utilize supramolecular interactions such as hydrogen bondingandorganic coordination to activatelactide and stabilizethe growing chainend,thereby exhibitinga synergisticenhancement in both catalytic activity andselectivity.Compared to metal-basedcatalysts,theyofferadvantagessuchaslowtoxicityandlowcost.Whencompared to multicomponentorganiccatalysts,theydemonstratesuperiorpolymerizationcontrollabilityandenhanced selectivity.This reviewsummarizesseveralrepresentativesingle-molecule bifunctionalcatalysts,including hydrogen-bonding-basedorganic bifunctionalcatalysts,trifunctional organiccatalysts,andalkali metalion-basedcatalyststhatintegrate hydrogen-bonding efects and initiation functions within a single molecule,along with theircharacteristics in catalyzing thering-opening polymerization oflactide andblock copolymerization are discussed.Thisreview proposes that future research should focus on developing single-molecule multifunctionalcatalyst systems that balance highcatalyticactivity with stereoselectivity, systematically elucidating the structure-activityrelationshipsand unique mechanisms of this class of catalysts from the perspective of supramolecular interactions.

Key words: lactide；polylactic acid;catalytic polymerization；stereoselective polymerization；ring-opening copolymerization

聚乳酸(PLA)是一种具有代表性的生物基脂肪族聚酯，因其生物可降解性和生物相容性而备受关注，由丙交酯(LA)催化聚合合成PLA是工业上制备PLA材料的一条重要途径[1,2]。（剩余20239字）