Modification of Poly(styrene-co-maleic anhydride) with Amino Alcohols in the Melt

Becker, Henning; Schmidt-Naake, G.

doi:10.1002/1521-4125(200201)25:1<37::aid-ceat37>3.0.co;2-j

Cited by 11 publications

(11 citation statements)

References 2 publications

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“…To determine the IEC, specimens of similar weight were soaked in 50 mL of 0.01 N sodium hydroxide solution for 12 h at ambient temperature. Then, 10 mL of each sample was titrated with 0.01 N sulfuric acid 13. The sample was regenerated with 1 M hydrochloric acid, washed free of acid with water, and dried to a constant weight.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of poly(vinyl alcohol)‐based membranes for direct methanol fuel cell

Smitha¹,

Sridhar²,

Khan³

2005

J of Applied Polymer Sci

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Membranes made of poly(vinyl alcohol) (PVA) and its ionic blends with sodium alginate (SA) and chitosan were synthesized and characterized for their ionexchange capacity (IEC) and swelling index values to investigate their applicability in direct methanol fuel cells (DMFCs). These membranes were assessed for their intermolecular interactions, thermal stabilities, and mechanical strengths with Fourier transform infrared spectroscopy, Xray diffraction methods, differential scanning calorimetry, thermogravimetric analysis, and tensile testing, respectively. Methanol permeability and proton conductivity were also estimated and compared to that of Nafion 117. In addition to being effective methanol barriers, the membranes had a considerably high IEC and thermal and mechanical stabilities. The addition of small amounts of anionic polymer was particularly instrumental in the significant reduction of methanol permeability from 8.1 ϫ 10 Ϫ8 cm 2 /s for PVA to 6.9 ϫ 10 Ϫ8 cm 2 /s for the PVA-SA blend, which rendered the blend more suitable for a DMFC. Low methanol permeability, excellent physicomechanical properties, and above all, cost effectiveness could make the use of these blends in DMFCs quite attractive.

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Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of poly(vinyl alcohol)‐based membranes for direct methanol fuel cell

Smitha¹,

Sridhar²,

Khan³

2005

J of Applied Polymer Sci

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“…Several functional monomers such as divinylbenzene (DVB) [206,247], triallyl cyanurate (TAC) [248], N,N,-methylene-bis-acrylamide [249], bis(vinyl phenyl) ethane (BVPE) [250], and acetylene [251] have been suggested for achieving the crosslinking goal during the irradiation process. However, crosslinking can also have negative effects on the performance of radiation-grafted alkaline membranes in PEM fuel cells.…”

Section: Membranementioning

confidence: 99%

A review of radiation-grafted polymer electrolyte membranes for alkaline polymer electrolyte membrane fuel cells

Zhou

Shao

Chen

et al. 2015

Journal of Power Sources

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“…Ion exchange capacity (IEC) indicates the density of ionizable hydrophilic groups in the membrane matrix, which are responsible for the IC of the membranes, and this is an indirect approximation of the proton conductivity34, which is one of the main objectives of application the proton exchange membranes in DMFCs application.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of novel grafted cellophane‐phosphoric acid‐doped membranes for proton exchange membrane fuel‐cell applications

Abu‐Saied

Elzatahry

El–Khatib

et al. 2011

J of Applied Polymer Sci

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This work concerns preparation of acid-base polyelectrolyte membranes for fuel-cell applications from cellulosic backbones for the first time. Grafted cellophanephosphoric acid-doped membranes for direct oxidation methanol fuel cells (DMFC) were prepared following three steps. The first two steps were conducted to have the basic polymers. The first step was introducing of epoxy groups to its chemical structure through grafting process with poly(-glycidylmethacrylate) (PGMA). The second step was converting the introduced epoxy groups to imides groups followed by phosphoric acid (APO 3 H) doping as the last step. This step significantly contributes to induce ion exchange capacity (IEC) and ionic conductivity (IC). Chemical changes of the cellophane composition and morphology characters were followed using FTIR, TGA, and SEM analysis. Different factors affecting the membranes characters especially IEC, methanol permeability, and thermal stability were investigated and optimized to have the best preparation conditions. Compared to Nafion 117 membrane, cellophane-modified membranes show a better IEC, less methanol permeability, and better mechanical and thermal stability. IEC in the range of 1-2.3 meq/g compared to 0.9 meq/g per Nafion was obtained, and methanol permeability has been reduced by one-order magnitude. However, the maximum obtained IC for cellophane-PGMA-grafted membrane doped with phosphoric acid was found 2.33 Â 10 À3 (S cm À1 ) compared to 3.88 Â 10 À2 (S cm À1 ) for Nafion 117. The obtained results are very promising for conducting further investigations taking into consideration the very low price of cellophane compared to Nafion.

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Modification of Poly(styrene-co-maleic anhydride) with Amino Alcohols in the Melt

Cited by 11 publications

References 2 publications

Synthesis and characterization of poly(vinyl alcohol)‐based membranes for direct methanol fuel cell

Synthesis and characterization of poly(vinyl alcohol)‐based membranes for direct methanol fuel cell

A review of radiation-grafted polymer electrolyte membranes for alkaline polymer electrolyte membrane fuel cells

Preparation and characterization of novel grafted cellophane‐phosphoric acid‐doped membranes for proton exchange membrane fuel‐cell applications

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