Gas transport properties of soluble poly(amide imide)s

Kresse, Ingo; Usenko, Andrey A.; Springer, Jürgen; Privalko, V. P.

doi:10.1002/(sici)1099-0488(19990815)37:16<2183::aid-polb20>3.0.co;2-5

Cited by 27 publications

(11 citation statements)

References 16 publications

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“…The diffusivity, D, was calculated from the relationship D = 2 /6Â where is the membrane thickness and Â the time-lag. The apparent solubility of the gases in the membrane was calculated from the relationship S = P/D [47][48][49][50]. The time lag method for the calculation of diffusivities and solubilities of slow diffusing gases can be reliably used if degassing times are in the range of 4-6Â [51,52].…”

Section: Permeation: Single Gas and Gas Mixturesmentioning

confidence: 99%

Mixed-matrix membranes containing MOF-5 for gas separations

Perez

Balkus

Ferraris

et al. 2009

Journal of Membrane Science

539

307

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Section: Permeation: Single Gas and Gas Mixturesmentioning

confidence: 99%

Mixed-matrix membranes containing MOF-5 for gas separations

Perez

Balkus

Ferraris

et al. 2009

Journal of Membrane Science

539

307

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“…The high permeability is primarily caused by high free volume, while significant increase in gas permselectivity may be due to restricted segmental motion. [3][4][5][6] On the basis of these facts, one can design new polymer to combine the two favorable factors, thus preparing polymers with both high gas permeability and high permselectivity.…”

Section: Introductionmentioning

confidence: 99%

Gas and Water Vapor Transport through a Series of Novel Poly(aryl ether sulfone) Membranes

Wang

Chen

2001

Macromolecules

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The permeation behavior of water vapor, H2, CO2, O2, N2, and CH4 gases in a series of novel poly(aryl ether sulfone)s has been examined over a temperature range of 30-100°C. These polymers include four alkyl-substituted cardo poly(aryl ether sulfone)s and four intermolecular interaction enhanced poly(aryl ether sulfone)s. Their water vapor and gas transport properties were compared to the unmodified cardo poly(aryl ether sulfone) (PES-C). It was found that the bulky alkyl substituents on the phenylene rings were advantageous for gas permeability, while the intermolecular hydrogen bonds and ionic bonds resulted in a considerable increase in gas permselectivity. The causes of the trend were interpreted according to free volume, interchain distance, and glass transition temperature, together with the respective contribution of gas solubility and diffusivity to the overall permeability. Of interest was the observation that IMPES-L, which simultaneously bears bulky isopropyl substituent and pendant carboxylic groups, displayed 377% higher O 2 permeability and 5.3% higher O2/N2 permselectivity than PES-C. Furthermore, sodium salt form PES-Na + and potassium salt form PES-K + exhibited water vapor permeability twice as high as PES-C and H2O/N2 selectivity in 10 5 order of magnitude.

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“…Wide‐angle X‐ray diffractogram method has been proved useful in the characterizations of openness degree of polymer chains or segments for a variety of amorphous polymers such as polyimides,26 Poly(amide imide)s,27 polyarylates,28 and poly(aryletherketone)s 29. As shown in Figure 7, all of the four cured epoxides are amorphous.…”

Section: Resultsmentioning

confidence: 99%

“…Wide-angle X-ray diffractogram method has been proved useful in the characterizations of openness degree of polymer chains or segments for a variety of amorphous polymers such as polyimides, [26] Poly(amide imide)s, [27] polyarylates, [28] and poly(aryletherketone)s. [29] As shown in Figure 7, all of the four cured epoxides are amorphous. Moreover, the cured Epoxide II-IV have maximum peaks at the similar diffraction angles of 16.83, 17.45, and 17.108, but the halo of the cure Epoxide I shifts obviously towards larger angle (24.458).…”

Section: Viscoelastic Propertiesmentioning

confidence: 99%

Silicon‐Containing Cycloaliphatic Epoxy Resins with Systematically Varied Functionalities: Synthesis and Structure/Property Relationships

Liu

Wang

2011

Macro Chemistry & Physics

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The manipulation of the properties of cycloaliphatic epoxy resins by systematical variations of the molecular structure is demonstrated. Specifically, four cycloaliphatic epoxy resins with silicon‐center linked via methyl, phenyl, and epoxy groups of different number were synthesized. The cured epoxides had remarkably changed crosslinking density from 0.45 × 10−3 to 9.64 × 10−3 mol · cm−3, glass transition temperature from 133 to 237 °C, and considerably decreased thermal expansion coefficient from 6.44 × 10−5 to 4.83 × 10−5 K−1. It was proved that the higher crosslinking density was related to more opened segments by wide‐angle X‐ray diffraction. The physical properties of cured products and their correlations with the chemical structures were investigated in detail.

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Gas transport properties of soluble poly(amide imide)s

Cited by 27 publications

References 16 publications

Mixed-matrix membranes containing MOF-5 for gas separations

Mixed-matrix membranes containing MOF-5 for gas separations

Gas and Water Vapor Transport through a Series of Novel Poly(aryl ether sulfone) Membranes

Silicon‐Containing Cycloaliphatic Epoxy Resins with Systematically Varied Functionalities: Synthesis and Structure/Property Relationships

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