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Citation: HUANG Xuehong, LIN Juan, ZHENG Ronxue, LIN Yifeng, DING Fuchuan, LING Qidan. Synthesis of Side-chain-sulfonated Poly(ether ether ketone) as Cation Exchange Membranes by Atom Transfer Radical Polymerization[J]. Chinese Journal of Applied Chemistry, ;2014, 31(8): 878-884. doi: 10.3724/SP.J.1095.2014.30400 shu

Synthesis of Side-chain-sulfonated Poly(ether ether ketone) as Cation Exchange Membranes by Atom Transfer Radical Polymerization

1.
Fujian Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, China

Corresponding author: DING Fuchuan, LING Qidan,
Received Date: 4 August 2013
Available Online: 28 October 2013
Fund Project: 国家自然科学基金资助项目(61250016,60976019) (61250016,60976019)福建省自然科学基金(2013J01172) (2013J01172)福建省教育厅项目(JB12042,JK2013009) (JB12042,JK2013009)

Poly(ether ether ketone)(PEEK) was synthesized by the 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 with N-bromosuccinimide(NBS),hydroxylation with dimethylol propionate sodium and esterification reaction with bromo-2-methylpropionyl bromide. The membranes of PEEK-g-StSO₃Na were prepared by solution casting. A mixed solvent of water and N-methyl-2-pyrrolidone(NMP) was used to design the membrane morphology. The structure and morphology of PEEK-g-StSO₃Na membranes were characterized by FT-IR,¹H NMR,TGA and SEM. The synthesized PEEK-g-StSO₃Na was found to improve hydrophilic/hydrophobic phase separation. With the increase of the grafting density of StSO₃Na,the ion exchange capacity(IEC) increases from 0.643 to 2.034 mmol/g and the conductivities of the membrane is 8.34×10^-2 S/cm. The PEEK-g-StSO₃Na membranes have higher proton conductivities and lower swelling ratio than Nafion 117.
- atom transfer radical polymerization,
- poly(ether ether ketone),
- cation exchange membrane,
- sodium p-styrenesulfonate
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