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原子转移自由基聚合法合成梳型磺化聚醚醚酮

发表时间:2017-06-30  浏览量:136  下载量:30
全部作者: 谢红梅,吴舒鸿,戴素仪,沈桂燕,黄雪红
作者单位: 福建师范大学材料科学与工程学院
摘 要: 以二氟二苯甲酮、双酚芴和邻甲基氢醌为单体经缩聚合成聚醚醚酮[poly(ether ether ketone),PEEK],PEEK经修饰合成含有异丙基溴侧基的聚醚醚酮,以此为原子转移自由基聚合(atom transfer radical polymerization,ATRP)大分子引发剂,通过ATRP在PEEK主链上接枝引入聚苯乙烯磺酸钠侧链,得到梳状PEEK接枝聚合物(PEEK-g-StSO3Na)。采用傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FTIR)、核磁共振氢谱(1H nuclear magnetic resonance,1H NMR)、热重(thermogravimetry,TG)分析和扫描电子显微镜(scanning electron microscope,SEM)等方法对PEEK-g-StSO3Na的结构进行表征。结果表明,苯乙烯磺酸钠被成功接枝到PEEK主链上,PEEK-g-StSO3Na膜具有明显的亲水疏水微相分离结构。离子交换容量(ion exchange capacity,IEC)为1.41 mmol/g、吸水率为51.9%的PEEK-g-StSO3Na膜的电导率为5.42×10−2 S/cm,与Nafion117膜相当,但该膜的溶胀率为8.16%,低于Nafion117膜的11.50%. 在相同的IEC值下,梳型PEEK-g-StSO3Na比主链型磺化聚醚醚酮(SPEEK)具有更好的H+透过性能。
关 键 词: 功能高分子材料;原子转移自由聚合;磺化聚醚醚酮;苯乙烯磺酸钠;离子交换容量
Title: Synthesis of comb-shaped sulfonated poly(ether ether ketone) by atom transfer radical polymerization method
Author: XIE Hongmei, WU Shuhong, DAI Suyi, SHEN Guiyan, HUANG Xuehong
Organization: College of Materials Science and Engineering, Fujian Normal University
Abstract: Poly(ether ether ketone) (PEEK) was synthesized by aromatic nucleophilic polycondensation reaction of 4,4’-difluorobenzophenone, bisphenol A and 2-methylhydroquinone. Double-arm PEEK macroinitiator containing isopropyl bromide end groups was obtained by bromination. Comb-like PEEK-g-PStSO3Na was successfully synthesized via atom transfer radical polymerization (ATRP) using double-arm PEEK as macroinitiator and sulfonated styrene as monomer. The structure and morphology of PEEK-g-StSO3Na membrane were characterized by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H NMR), thermogravimetry (TG) and scanning electron microscope (SEM). The synthesized PEEK-g-StSO3Na is found to improve hydrophilic/hydrophobic phase separation. The ion exchange capacity (IEC), water content and onductivity of PEEK-g-StSO3Na were 1.41 mmol/g, 51.9% and 5.42×10−2 S/cm, respectively. However, its swelling ratio is 8.16% which is lower than that of Nafion117 membrane (11.50%). Otherwise, comb-shaped PEEK-g-StSO3Na has a better H+ permeability than main-chain sulfonated PEEK (SPEEK) membrane with the same IEC value.
Key words: functional polymer materials; atom transfer radical polymerization; sulfonated poly(ether ether ketone); sodium styrenesulfonate; ion exchange capacity
发表期数: 2017年6月第12期
引用格式: 谢红梅,吴舒鸿,戴素仪,等. 原子转移自由基聚合法合成梳型磺化聚醚醚酮[J]. 中国科技论文在线精品论文,2017,10(12):1328-1337.
 
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