Polymers, High-Temperature

Parker, David G.; Bussink, Jan; Grampel, Hendrik T. van de; Wheatley, G. W.; Dorf, Ernst‐Ulrich; Ostlinning, Edgar; Reinking, Klaus

doi:10.1002/14356007.a21_449

Cited by 21 publications

(16 citation statements)

References 62 publications

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“…These values are consistent with what is seen for most PN resin systems, which is a significant improvement over traditional thermoplastic polysulfones, which illustrates the unique effects that the PN crosslinking unit has on the thermal and oxidative properties. 27,28 To simulate the use of polymer 6 under real environmental conditions, we assessed the effect of long-term heating or aging at high temperatures under air. By subjecting polymers 6a and 6b to continuous heating at 329 8C (625 8F), a cumulative weight loss of 10 and 8.5 % and 16 and 18 % was observed for polymers 6a and 6b, postcured at 375 8C, for 100 and 150 h, respectively.…”

Section: Articlementioning

confidence: 99%

Synthesis of bisphenol A‐free oligomeric phthalonitrile resins with sulfone and sulfone‐ketone containing backbones

Laskoski

Clarke

Neal

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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Two new oligomeric sulfone and sulfone-ketone containing phthalonitrile (PN) resins with excellent processability have been developed. The PN monomers were prepared from the reaction of an excess amount of bisphenol S with 4-(chlorophenyl)sulfone or 4,4-dichlorobenzophenone in the presence of a base in a solvent mixture (dimethylsulfoxide/toluene), followed by end-capping with 4-nitro-PN in a two-step, one-pot reaction. These PN resins exhibited good viscosities and cure times for molding into various shapes. After being thermally cured to yield crosslinked polymers, these polymers demonstrated superb mechanical properties, thermo-oxidative stability, and maintained good dielectric properties. Published 2016.† J. Polym. Sci., Part A:Polym.

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Section: Articlementioning

confidence: 99%

Synthesis of bisphenol A‐free oligomeric phthalonitrile resins with sulfone and sulfone‐ketone containing backbones

Laskoski

Clarke

Neal

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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“…1 These moieties have been incorporated in numerous pharmaceutical compounds (e.g. Esomeprazole, Dapsone, Sulmazole, Methionine sulfone and Ponazuril) 2 and even in polymeric materials 3 (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

An environmentally benign and selective electrochemical oxidation of sulfides and thiols in a continuous-flow microreactor

et al. 2017

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“…In our concept, the phase inversion polymer synthesis approach with a water-soluble solvent is used to form a low-porosity dense skin layer across clay-containing interburden layers. We selected PES as the polymer because of its low cost, superior film forming ability, good mechanical properties, strong chemical and thermal stabilities, and its resistance to acids and alkalis (Parker et al 2000). In the results, we observed that this polymer coating reduced clay fines production from two interburden rock samples, but formed a porous membrane coating on a coal sample.…”

Section: Introductionmentioning

confidence: 99%

A phase inversion polymer coating to prevent swelling and spalling of clay fines in coal seam gas wells

Hamilton

Febrina

et al. 2018

Int J Coal Sci Technol

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We report a phase inversion polymer coating as a novel concept with potential to prevent clay swelling and fines generation in coal seam gas, or other petroleum, wellbores. Our approach uses polyethersulfone (PES) with N-methyl-2-pyrrolidone (NMP) as a water-soluble solvent to form a dense, low-porosity film across the clay-rich interburden layers, but a porous and permeable membrane on coal seams. This contrasting behaviour occurs because the coal contains much more free water than the clay-rich interburden layers. We demonstrate the efficacy of the method to prevent clay spalling in immersion tests and under a flow of fresh water in a visual swell test apparatus. The clay-rich rocks studied were mudstone and siltstone, and these were dip coated in the PES/NMP solution. The uncoated mudstone swelled and broke apart quickly in the immersion test and visual flow test, but the PES coated rock samples were stable for 30 days. The coated rock and coal samples were characterised by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. The morphology of coated mudstone and coated coal samples showed that the polymer formed a dense layer across the low-permeability mudstone, but an open porous structure on the coal surface. The effect of the coating on the permeability of KCl brine through coal was measured in a core-flood apparatus. Although the permeability of the coal showed some deterioration after coating, from (0.58 ± 0.12) mD to (0.3 ± 0.03) mD, these results demonstrate the potential of a smart polymer coating to prevent clay swelling while remaining permeable to gas and water on coal layers.

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Polymers, High-Temperature

Cited by 21 publications

References 62 publications

Synthesis of bisphenol A‐free oligomeric phthalonitrile resins with sulfone and sulfone‐ketone containing backbones

Synthesis of bisphenol A‐free oligomeric phthalonitrile resins with sulfone and sulfone‐ketone containing backbones

An environmentally benign and selective electrochemical oxidation of sulfides and thiols in a continuous-flow microreactor

A phase inversion polymer coating to prevent swelling and spalling of clay fines in coal seam gas wells

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