Reversible Chain Transfer Catalyzed Polymerization with Alkyl Iodides Generated from Alkyl Bromides by in Situ Halogen Exchange  

作　　者：Dan-Ni Gao Yu-Lai Zhao Jing-Yu Cai Lin-Xi Hou Long-Qiang Xiao 

机构地区：[1]Department of Materials-Oriented Chemical Engineering,School of Chemical Engineering,Fuzhou University,Fuzhou 350116,China [2]Qingyuan Innovation Laboratory,Quanzhou 362801,China [3]Fujian Key Laboratory of Advanced Manufacturing Technology of Specialty Chemicals,Fuzhou University,Fuzhou 350116,China

出　　处：《Chinese Journal of Polymer Science》2021年第9期1161-1168,共8页高分子科学（英文版）

基　　金：We gratefully acknowledge the financial support from Natural Science Foundation of Fujian Province(No.2019J05040);Key Program of Qingyuan Innovation Laboratory(No.00221003);‘111'program and Talent program of Fuzhou University(No.GXRC-18041).

摘　　要：Reversible chain transfer catalyzed polymerization(RTCP)is a practical and efficient process for the precise synthesis of polymers with special architecture by using simple phenols(2,4,6-trimethylphenol,TMP)or hydrocarbons(xanthene,XT)as efficient organocatalysts.Herein,alkyl iodide(R-1),which was gen erated from in situ bromine-iodine transformation of alkyl bromide(R-Br)with sodium iodide(Nal),was served as initiator to mediate RTCP with TMP or XT.MMA and other functional methacrylates,including GMA,DEAM,DMAEMA and BzMA,were successfully initiated by combining orga no catalysts and azo in itiators to yield polymers with low-polydispersity(M_(w)/M_(n)=1.1-1.5)and ideal mono mer conversions(50%-90%)at moderate temperature.More over,3-armstar polymers were also obtained by this method.The high chain-end fidelity of the obtained poly(methyl methacrylate)with iodine as chain-end group(PMMA-I)was confirmed by chain-extension reaction.The en vironme ntally frie ndly initiators and orga no catalysts exhibit powerful polymerization properties toward RTCP,providing a sign ificant method to synthesize functional polymers.

关 键 词：Reversible chain transfer catalyzed polymerization ORGANOCATALYST Halogen exchange 

分 类 号：TQ316.314[化学工程—高聚物工业]