Tuning Polymer Molecular Weight Distribution in Cationic RAFT Polymerization by Mixing Chain Transfer Agents  

作　　者：Miao Chen Jiajia Li Dong Xing Xiangqiang Pan Jian Zhu 

机构地区：[1]State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application,Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis,Department of Polymer Science and Engineering,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu,215123 China

出　　处：《Chinese Journal of Chemistry》2023年第14期1684-1690,共7页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22101196);the China Postdoctoral Science Foundation(No.2021M692348).

摘　　要：Polymer dispersity (Đ) or molecular weight distribution (MWD) is a basic but vital parameter for the properties of polymeric materials. Developing new methodologies for controlling polymer MWD is emerging as a research hotspot. However, the methods to tune polymer MWD in cationic polymerization are still not well explored. Herein, we present a simple method to control the dispersity of poly(isobutyl vinyl ether) (PIBVE) by mixing two different chain transfer agents in batch visible light induced cationic RAFT polymerization. A broad dispersity range (Đ ≈ 1.16—1.80) was successfully achieved while maintaining monomodal MWD. Moreover, chain extension of PIBVE through both cationic polymerization and radical polymerization has been studied, which also provides a method to tune polymer MWD in mechanism transformation polymerization.

关 键 词：RAFT PHOTOPOLYMERIZATION COPOLYMERS lonic polymerization Molecular weight distribution Dispersity 

分 类 号：O641.4[理学—物理化学]