Organic Br?nsted Acid-Catalyzed Stereoselective Cationic RAFT Polymerization:The Effect of RAFT Agents

Zheng-Yi Zhang ¹Zan Yang ¹Yun Liao ¹Sai-Hu Liao²

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作者信息

1. Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University),College of Chemistry,Fuzhou University,Fuzhou 350108,China;State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China
2. Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University),College of Chemistry,Fuzhou University,Fuzhou 350108,China;State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China;Beijing National Laboratory for Molecular Sciences,Beijing 100190,China
折叠

Abstract

The tacticity of vinyl polymers is a key factor affecting the properties of materials.Recently,organic Brønsted acids have been demon-strated as effective catalysts for the development of highly stereoselective cationic reversible addition-fragmentation chain transfer(RAFT)poly-merizations of vinyl ethers,in which the use of RAFT agents could allow the control the molecular weight and tacticity of polymer products simul-taneously.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 ob-tained when using dithiocarbonate ester-type RAFT agents with a benzyloxy Z group.

Key words

Brønsted acid catalysis/Stereoselective cationic polymerization/RAFT polymerization/Chain transfer agents/Tacticity

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基金项目

Recruitment Program of Global Experts of China()

国家自然科学基金(21602028)

国家自然科学基金(22371240)

Beijing National Laboratory for Molecular Sciences(BNLMS201913)

100-Talent program of Fujian,Fuzhou University and Xiamen University()

出版年

2024

高分子科学(英文版)

中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCD

影响因子：0.721

ISSN：0256-7679

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