Structural Characterization of a Polymer of Intrinsic Microporosity: X-ray Scattering with Interpretation Enhanced by Molecular Dynamics Simulations

McDermott, Amanda G.; Larsen, Gregory S.; Budd, Peter M.; Colina, Coray M.; Runt, James

doi:10.1021/ma1024945

Cited by 78 publications

(84 citation statements)

References 19 publications

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“…It is known that such samples have larger free volume elements as measured using positron annihilation lifetime spectroscopy [63]. A detailed study of the form of WAXD and SAXD of PIM-1 carried out recently [82] is in agreement with the observation made in the present paper. Fig.…”

Section: Resultssupporting

confidence: 90%

Gas permeation parameters of mixed matrix membranes based on the polymer of intrinsic microporosity PIM-1 and the zeolitic imidazolate framework ZIF-8

Bushell

Attfield

Mason

et al. 2013

Journal of Membrane Science

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333

204

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Section: Resultssupporting

confidence: 90%

Gas permeation parameters of mixed matrix membranes based on the polymer of intrinsic microporosity PIM-1 and the zeolitic imidazolate framework ZIF-8

Bushell

Attfield

Mason

et al. 2013

Journal of Membrane Science

Self Cite

333

204

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“…The use of X-ray scattering to characterise the amorphous structure of PIMs is also of value, especially in combination with computer simulations (see below) [96].…”

Section: Positron Annihilation Lifetime Spectroscopy (Pals)mentioning

confidence: 99%

“…However, subsequent studies using a series of simulated high pressure compression and relaxation achieve a realistic packing without the need for density measurements [98,99]. Validation of the resulting packing structure was performed by comparison with X-ray scattering measurements on thin films of the polymer [96]. An interesting observation that can be made from the simulated packing is the distortion of the macromolecule due to the energetically disfavoured formation of intrinsic microporosity and the attempt of the polymer to minimise surface area and maximise intermolecular interactions.…”

Section: Computer Simulationmentioning

confidence: 99%

Polymers of Intrinsic Microporosity

McKeown

2012

ISRN Materials Science

184

136

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This paper focuses on polymers that demonstrate microporosity without possessing a network of covalent bonds-the so-called polymers of intrinsic microporosity (PIM). PIMs combine solution processability and microporosity with structural diversity and have proven utility for making membranes and sensors. After a historical account of the development of PIMs, their synthesis is described along with a comprehensive review of the PIMs that have been prepared to date. The important methods of characterising intrinsic microporosity, such as gas absorption, are outlined and structure-property relationships explained. Finally, the applications of PIMs as sensors and membranes for gas and vapour separations, organic nanofiltration, and pervaporation are described.

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“…Nevertheless, there are few data reported about gas transport properties of blends comprising glassy and microporous polymers. Polymers of intrinsic microporosity (PIMs) feature porosity derived from inefficient packing due to the combination of rigid segments and sites of contortion (stiff units with spiro‐center) within the macromolecular backbone of the polymer . These characteristics render polymers with high fractional free volumes (FFV) and rigid backbones that might perform high permeabilities and low‐to‐moderate selectivities in gas separation applications .…”

Section: Introductionmentioning

confidence: 99%

Improved gas selectivity of polyetherimide membrane by the incorporation of PIM polyimide phase

Garcı́a

Marchese

Ochoa

2016

J of Applied Polymer Sci

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The aim of this work was to prepare blend membranes of a polyetherimide (PEI) and different ratios of a microporous polyimide (PIM‐B) in order to obtain an improved material for gas selectivity. Miscibility of the membranes was studied through fourier transform infrared spectroscopy (FTIR), Fluorescence, ultraviolet‐visible spectroscopy (UV–vis), polarize light microscope images, X‐ray diffraction (XRD), and differential scanning calorimetry analysis. Gas permeability assays were also performed. Results showed blends were partially miscible along the different ratios due to the existence of: (i) absorption shoulders at lower wavenumbers on the carbonyl stretching band; (ii) red‐shifting of Fluorescence and UV–vis absorption bands; (iii) decreasing of d‐spacing as the amount of PIM‐B phase increased; and (iv) composition‐dependent glass transition temperatures (Tgs). The mobility selectivity (Di/j) dominated H2 and O2 gas separations. High solubility coefficients (S) linked to PIM‐B microporosity improved the ideal gas selectivity of the blend membranes. PEI/PIM‐B membrane at the ratio of 80/20 showed impressive H2/CO2 (8.66) and O2/N2 (10.90) gas separation factors. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44682.

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Structural Characterization of a Polymer of Intrinsic Microporosity: X-ray Scattering with Interpretation Enhanced by Molecular Dynamics Simulations

Cited by 78 publications

References 19 publications

Gas permeation parameters of mixed matrix membranes based on the polymer of intrinsic microporosity PIM-1 and the zeolitic imidazolate framework ZIF-8

Gas permeation parameters of mixed matrix membranes based on the polymer of intrinsic microporosity PIM-1 and the zeolitic imidazolate framework ZIF-8

Polymers of Intrinsic Microporosity

Improved gas selectivity of polyetherimide membrane by the incorporation of PIM polyimide phase

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