Chemoselective Polymerization of Fully Biorenewableα-Methylene-γ-Butyrolactone Using Organophosphazene/Urea Binary Catalysts Toward Sustainable Polyesters

作     者：Yong Shen Wei Xiong Yongzheng Li Zhichao Zhao Hua Lu Zhibo Li 

作者机构：State Key Laboratory Base of Eco-Chemical EngineeringCollege of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042 Key Laboratory of Biobased Polymer MaterialsShandong Provincial Education DepartmentCollege of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042 Beijing National Laboratory for Molecular SciencesCenter for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871 

出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)

年 卷 期：2021年第3卷第1期

页      面：620-630页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：This research was made possible as a result of generous grants from National Natural Science Foundation of China(no.21801151) Shandong Provincial Natural Science Foundation,China(ZR2018BEM029) the 111 Project(no.D17004) the Taishan Scholars Constructive Engineering Foundation(no.tsqn20161031) 

主　　题：organocatalyst ring-opening polymerization polyester sustainable polymer recyclability 

摘      要：Despite the great potential of biorenewableα-methylene-γ-butyrolactone(MBL)to produce functional,recyclable polyester,the ring-opening polymerization(ROP)of MBL remains a challenge due to the competing polymerization of the highly reactive exocyclic double bond and low-strained five-membered *** this contribution,we present the first organocatalytic chemoselective ROP of MBL to exclusively produce functional unsaturated polyester by utilizing a phosphazene base/urea binary *** show that delicate chemoselectivity can be realized by controlling the temperature and using selected urea *** obtained polyester can be completely recycled back to its monomer by chemolysis under mild *** and theoretical calculations provide mechanistic insights and indicate that the ROP pathway is kinetically favored by using urea with stronger acidity at low temperatures.