Organic Brønsted Acid-Catalyzed Stereoselective Cationic RAFT Polymerization:The Effect of RAFT Agents  

作　　者：Zheng-Yi Zhang Zan Yang Yun Liao Sai-Hu Liao 

机构地区：[1]Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University),College of Chemistry,Fuzhou University,Fuzhou,350108,China [2]State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen,361005,China [3]Beijing National Laboratory for Molecular Sciences,Beijing,100190,China

出　　处：《Chinese Journal of Polymer Science》2024年第6期711-717,共7页高分子科学（英文版）

基　　金：supported by the Recruitment Program of Global Experts of China,the National Natural Science Foundation of China(Nos.21602028 and 22371240);Beijing National Laboratory for Molecular Sciences(No.BNLMS201913);100-Talent program of Fujian,Fuzhou University and Xiamen University.

摘　　要：The tacticity of vinyl polymers is a key factor affecting the properties of materials.Recently,organic Brønsted acids have been demonstrated as effective catalysts for the development of highly stereoselective cationic reversible addition-fragmentation chain transfer(RAFT)polymerizations of vinyl ethers,in which the use of RAFT agents could allow the control the molecular weight and tacticity of polymer products simultaneously.However,the effect of RAFT agents on the tacticity-regulation remains elusive and lacks of investigation.In this study,we synthesized four types of RAFT agents and evaluated their influence in the stereoselective cationic polymerization of isobutyl vinyl ether in the presence of PADI as a Brønsted acid catalyst,which unveils that the Z group of RAFT agents could not only affect the polydispersity of the products,but also exert a profound effect on the stereoselectivity.After extensive screening of the RAFT agents,high stereoregularity(isotacticity,90%m)was obtained when using dithiocarbonate ester-type RAFT agents with a benzyloxy Z group.

关 键 词：Bronsted acid catalysis Stereoselective cationic polymerization RAFT polymerization Chain transfer agents TACTICITY 

分 类 号：TQ316.3[化学工程—高聚物工业] O643.36[理学—物理化学]