Synthesis and characterization of sulfonated poly(arylene ether) polyimide multiblock copolymers for proton exchange membranes

Lee, Hae Seung; Roy, Abhishek; Badami, Anand S.; McGrath, James E.

doi:10.1007/bf03218768

Cited by 58 publications

(48 citation statements)

References 13 publications

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“…Since microemulsion morphology shows cocontinuous structure, it is very useful for fuel-cell applications. 311,312 Recently, Park and Balsara 313 prepared poly (styrene-co-sulfonated styrene)-block-polymethyl butylenes. This block copolymer can show microdomains even when the total molecular weight is as small as 3,200.…”

Section: Phase Behavior Of Various Architectures Of Blockmentioning

confidence: 99%

Self-assembled block copolymers: Bulk to thin film

2008

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Block copolymers that two or more polymer chains are covalently linked have drawn much attention due to self-assembly into nanometer-sized morphology such as lamellae, cylinders, spheres, and gyroids. In this article, we first summarize the phase behavior of block copolymers in bulk and thin films and some applications for new functional nanomaterials. Then, future perspectives on block copolymers are described.

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Section: Phase Behavior Of Various Architectures Of Blockmentioning

confidence: 99%

Self-assembled block copolymers: Bulk to thin film

2008

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“…The critical surface energy γ C evaluated by the log(1+cosθ) vs log(γ L ) plot and eq. (14) can estimate the surface energy γ S unlike the Zisman plot and the Young-Dupré-Good-Girifalco plot.…”

Section: Methodsmentioning

confidence: 99%

“…(9) and (13), solid surface tension γ S can be calculted from eq. (14): (14) Also, the reversible work of adhesion W a is expressed by: (15) Consequently, combining eq. (15) with Young-Dupré's eq.…”

Section: (9)mentioning

confidence: 99%

“…[3][4][5] However, polyimide films are known to absorb water in some amounts, [6][7][8][9] despite their relatively high chemical resistance characteristics. [10][11][12][13][14] Water absorbed in polyimide films causes metal corrosion, package cracking, delaminating, failures of the adhesion to metal, and degradation of dielectric properties. [15][16][17][18] To predict the behavior of polyimides and to optimize their fabrication, it is important to understand the relationship between polyimides structure and their surface properties.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of surface energy of BPDA-BAPP polyimide

Kim

Kwon

2009

Macromol. Res.

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The surface properties (water sorption and repellency, adhesion) are closely related to the surface tension of polymer solids. The critical surface tension (γ c ) and surface tension (γ s ) of a polymer solid were estimated by the contact angle method by our quantitative imaging system. BPDA (3,3',4,4'-biphenyl tetracarboxylic dianhydride)-BAPP (1,3-Bis(4-aminophenoxy) propane) polyimide was successfully synthesized. The γ c values were analyzed by a Zisman plot, a Young-Dupré-Good-Girifalco plot, and a log (1+cos θ) vs log γ L plot. The γ s value of BPDA-BAPE polyimide was evaluated using the geometric mean equation and our multiple regression analysis. The calculated values of γ S d (a dispersion component), γ S p (a polar component), γ S h (a hydrogen bonding component), and γ S were 30. 79, 9.32, 0.20, and 40.31 mN·m -1 , respectively. The γ S of BPDA-BAPP polyimide containing both a methylene group and an ether group was larger than that of the polyimide containing only a methylene group.

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“…1 Particularly targeting PEM applications in direct methanol fuel cell (DMFC) which is regarded as the most powerful fuel cell for portable devices such as cellular phone and laptop computer, there have been efforts to find alternative PEM materials to Nafion showing lower methanol crossover and better water management. [2][3][4][5][6] Among the successful reports, the partially sulfonated polystyrene (sPS) has drawn researchers' attention since it showed promising properties toward DMFC application. sPS has been widely diversified.…”

Section: Introductionmentioning

confidence: 99%