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

林朝阳 ¹郝小飞 ¹霍炳臣 ¹张彦昌 ¹王冬梅 ¹李天仚¹

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作者信息

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
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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5.0×106.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.

Abstract

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 5.0×106.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

Key words

polyacrylamide/RAFT polymerization/aqueous polymerization/narrow molecular weight distribution

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基金项目

河南省科学院基本科研业务费(220602080)

出版年

2024

化学研究

河南大学

化学研究

CSTPCD

影响因子：0.471

ISSN：1008-1011

参考文献量6

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