Please use this identifier to cite or link to this item:
|Title:||Embedding poly(styrene sulfonic acid) into PVDF matrix - A new type of proton electrolyte membrane|
|Keywords:||Amphiphilic polymer blend|
Poly(styrene sulfonic acid)
Proton electrolyte membrane
|Citation:||Chen, N., Hong, L. (2004-03). Embedding poly(styrene sulfonic acid) into PVDF matrix - A new type of proton electrolyte membrane. Polymer 45 (7) : 2403-2411. ScholarBank@NUS Repository. https://doi.org/10.1016/j.polymer.2004.01.047|
|Abstract:||Hydrophilic polymer segments, consisting of styrene sulfonic acid (SSA) units, were uniformly embedded into hydrophobic poly(vinylidene fluoride) (PVDF) matrix through the mediation of poly(methyl methacrylate) (PMMA) segments, with which SSA segments form a copolymer. Discrete domains (∼100 nm) assembled by the SSA segments have been identified throughout the matrix of the membrane, which was prepared through blending of the copolymer P(MMA-SSA) and the PVDF. The thermal stability of the SSA was largely boosted in such hydrophobic environment. This unique matrix structure offers proton conductivity of as high as 10-3S/cm at a low SSA equivalent (0.6 mmol -SO3H/g of membrane), which is accompanied with a low level of water uptake (26%) at ambient temperature. Using this type of polymer membrane as electrolyte, the electrochemical cell possesses obvious capacitive resistance when the membrane is in the anhydride form according to the impedance analysis. However, the capacitive character vanishes when the membrane is hydrated; this response is attributed to the existence of highly dispersed SSA domains in the membrane. This work also analyzes the impedance spectra of the membranes at different hydrated states or with different SSA contents by using an equivalent electrical circuit. © 2004 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 12, 2018
WEB OF SCIENCETM
checked on Jun 4, 2018
checked on May 11, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.