水相RAFT聚合合成中低相对分子质量窄分布聚丙烯酰胺  

Synthesis of polyacrylamide with medium or low molecular weight and narrow weight distribution by aqueous RAFT polymerization

作　　者：林朝阳 郝小飞 霍炳臣 张彦昌[1] 王冬梅[1] 李天仚[1] LIN Chaoyang;HAO Xiaofei;HUO Bingchen;ZHANG Yanchang;WANG Dongmei;LI Tianxian(High and New Technology Research Certer of Henan Acsdemy of Sciences,Henan key Laboratory of Fine Chemicals,Zhengzhou 450002,Henan,China)

机构地区：[1]河南省科学院高新技术研究中心,河南省精细化工重点实验室,郑州450002

出　　处：《化学研究》2024年第4期352-361,共10页Chemical Research

基　　金：河南省科学院基本科研业务费(220602080)。

摘　　要：为开发一种高效的RAFT试剂和简便的合成相对分子质量较高的窄分布聚丙烯酰胺的方法,合成了一种新型的可控/活性聚合链转移剂(RAFT试剂)1,4-苄基三硫代碳酸酯基二丙酸,该RAFT试剂在热引发或光引发条件下,引发活性可控水溶液聚合反应合成了窄分布的低相对分子质量及中等相对分子质量聚丙烯酰胺,且分散系数Mw/Mn<1.1。通过改变单体[M]0/链转移剂[CTA]0/引发剂进料比([M]0/[CTA]0/[I]0)合成了不同相对分子质量的窄分布的聚丙烯酰胺,相对分子质量最高可达5.0×10^(6)。聚丙烯酰胺相对分子质量及分散系数由凝胶渗透色谱-18角度激光散射仪测定。In order to develop an efficient RAFT reagent and a simple method for synthesizing narrow distribution polyacrylamide with high molecular weight,A new controllable/active polymer chain transfer agent(RAFT reagent)1,4-benzyl trithiocarbonate-based dipropionic acid was synthesized.Under the condition of thermal initiation or photoinitiation,the RAFT reagent initiated the active controllable aqueous solution polymerization to synthesize narrow distribution of low molecular weight and medium molecular weight polyacrylamide,with the dispersion coefficient of Mw/Mn<1.1.The narrow distribution polyacrylamide with different molecular weights was synthesized by changing the monomer[M]0/chain transfer agent[CTA]0/initiator feed ratio([M]0/[CTA]0/[I]0),with the highest molecular weight of 5.0×10^(6).The molecular weight and dispersion coefficient of polyacrylamide were determined by Chromatography-Eighteen Angles Laser Light Scattering(GPC-MALLS).

关 键 词：聚丙烯酰胺 RAFT聚合 水相聚合 窄相对分子质量分布 

分 类 号：O657.7[理学—分析化学]