Ternary fluoro-containing polyimide blends and fluoro-containing polyimide/polyester blends

Chung, Tai Shung; Foley, Paul; Jaffé, Michael

doi:10.1002/(sici)1099-1581(199709)8:9<537::aid-pat683>3.0.co;2-t

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…This T g is between the T g s of Psf (186°C) and Matrimid (320°C), which is indicative of the existence of a miscible blend at the interface. The composition of possible blending calculated based on Fox equation (shown in Figure 10)33 are 0.45/0.55 to 0.38/0.62 of Psf/Matrimid (weight ratio). Fourier transform infrared (FTIR) spectra in Figure 11 display wavelength shifts of the imide CO group (from 1715 to 1719 cm −1 ), and the CNC group (from 1092 to 1098 cm −1 ) because of molecular interactions.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin polymeric interpenetration network with separation performance approaching ceramic membranes for biofuel

et al. 2008

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in Wiley InterScience (www.interscience.wiley.com).Biofuel has emerged as one of the most strategically important sustainable fuel sources. The success of biofuel development is not only dependent on the advances in genetic transformation of biomass into biofuel, but also on the breakthroughs in separation of biofuel from biomass. The ''separation'' alone currently accounts for 60-80% of the biofuel production cost. Ceramic membranes made of sophisticated processes have shown separation performance far superior to polymeric membranes, but suffers fragility and high fabrication cost. We report the discovery of novel molecular engineering and membrane fabrication that can synergistically produce polymeric membranes exhibiting separation performance approaching ceramic membranes. The newly discovered Polysulfone/Matrimid composite membranes are fabricated by dual-layer coextrusion technology in just one step through phase inversion. An ultrathin denseselective layer made of an interpenetration network of the two materials with a targeted and stable interstitial space is formed at the interface of two layers for biofuel separation. The combined molecular engineering and membrane fabrication approach may revolutionize future membrane research and development for purification and separation in energy, environment, and pharmaceuticals.

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Section: Resultsmentioning

confidence: 99%

Ultrathin polymeric interpenetration network with separation performance approaching ceramic membranes for biofuel

et al. 2008

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“…[1][2][3][4][5][6][7][8][9][10] In addition, PI hybrids are often able to overcome severe thermal and mechanical stress concentration and associated reliability problems produced by the mismatch in coefficient of thermal expansion (CTE) and modulus between polymers, ceramics, or metals. [11][12][13][14][15][16][17][18] These improvements enable PIs to meet some ultimate requirements in demanding applications such as highly rapid speed-up circuits and complex multilayer devices.…”

Section: Introductionmentioning

confidence: 99%