Journal
NEW JOURNAL OF CHEMISTRY
Volume 40, Issue 4, Pages 3755-3762Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj02533h
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Funding
- Graduate Degree Thesis Innovation Foundation of Donghua University [15D310618]
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A new series of sulfonated poly(arylene ether sulfone) copolymers containing phenyl side groups with different sulfonation degrees (SPAES-PQ-xx) were successfully synthesized through direct aromatic nucleophilic substitution polycondensation of 3,3'-disulfonate-4,4'-dichlorodiphenylsulfone, 4,4-dichlorodiphenylsulfone and phenylhydroquinone (PQ). The degree of sulfonation was realized by controlling the quantity of the sulfonated monomer. The chemical and phase-separated structures of copolymers were characterized by proton nuclear magnetic resonance spectroscopy and atomic force microscopy. The properties of flexible and transparent SPAES membranes were evaluated. Compared to the hydroquinone-based SPAES membrane (SPAES-HQ-40), the effect of the phenyl side group on the water absorption properties, swelling properties and proton conductivity of SPAES-PQ-xx membranes was explored. The results demonstrated that the introduction of phenyl side groups could result in better dimensional, thermal and oxidative stability compared with those of the SPAES-HQ-40 membrane. In addition, the proton conductivity of SPAES-PQ-40 is up to 0.096 S cm(-1) at 80 degrees C.
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