Thermal and photo‐oxidation of polysulfone

Gesner, B. D.; Kelleher, P. G.

doi:10.1002/app.1968.070120518

Cited by 65 publications

(26 citation statements)

References 6 publications

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“…In order to facilitate fixation, prior to spin-coating the surface of NF-270 membrane was irradiated with UV in 10 mM BPh solution in ethanol to link photoinitiator groups to the surface [32]. As PES is known to be a photosensitive material [33,34], no such pretreatment was needed for PES membranes. UV irradiation was carried out in a UVA cube 100 (Dr. Hoenle UV Technology, UV wavelength 250-600nm) for 10 min without a UV filter; thereafter the samples were rigorously washed with DW and shaken in a fresh DW overnight.…”

Section: Methodsmentioning

confidence: 99%

Facile evaluation of coating thickness on membranes using ATR-FTIR

Bass

Freger

2015

Journal of Membrane Science

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Section: Methodsmentioning

confidence: 99%

Facile evaluation of coating thickness on membranes using ATR-FTIR

Bass

Freger

2015

Journal of Membrane Science

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“…The increase in dose of TiO 2 shifts the absorption band edge towards a visible region proportionately. A sharp increase was observed for plane PSf below 380 nm and is supported by literature [15,16]. After UV treatment, absorption edge further extends into the visible region and is attributed to electronic changes that may have occurred due to UV irradiation and need to be explored.…”

Section: Changes In Chemical Structure Of the Membranesmentioning

confidence: 82%

The effect of UV irradiation on PSf/TiO2 mixed matrix membrane for chromium rejection

et al. 2014

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“…Reports in the literature have noted the 3400cm" 1 -OH band for polysulfone film exposed to UV (41) and also to 3-MeV protons (38). Additionally, the loss of the 1385cm" 1 methyl band was noted in at least one study (41 Figure 13. GPC-DV molecular weight distribution of 10-month exposed polysulfone film (Reproduced from reference 12.…”

Section: Increase In Weight-and Z-average Molecular Weights (Mw and Mmentioning

confidence: 94%

Molecular-Level Response of Selected Polymeric Materials to the Low Earth Orbit Environment

Young

Siochi²,

Slemp

1996

ACS Symposium Series

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The NASA Long Duration Exposure Facility (LDEF) enabled the exposure of a wide variety of materials to the low Earth orbit (LEO) environment. This paper provides a summary of research conducted at the Langley Research Center into the response of selected LDEF polymers to this environment. Materials examined include graphite fiber reinforced epoxy, polysulfone, and addition polyimide matrix composites, films of FEP Teflon, Kapton, and several experimental high performance polyimides, and films of more traditional polymers such as poly(vinyl toluene) and polystyrene. Exposure duration was either 10 months or 5.8 years.Flight and control specimens were characterized by a number of analytical techniques including ultraviolet-visible and infrared spectroscopy, thermal analysis, scanning electron and scanning tunneling microscopy, x-ray photoelectron spectroscopy, and, in some instances, selected solution property measurements. Characterized effects were found to be primarily surface phenomena. These effects included atomic oxygen-induced erosion of unprotected surfaces and ultraviolet-induced discoloration and changes in selected molecular level parameters. No gross changes in molecular structure or glass transition temperature were noted.The National Aeronautics and Space Administration Long Duration Exposure Facility (LDEF) provided a novel opportunity for the aerospace community to examine the effects of long term low Earth orbit (LEO) exposure on a variety of materials. The 11-ton satellite depicted in Figure 1 was returned to Earth by the Space Shuttle Columbia in January 1990 after 69 months in orbit. It contained 57 experiments to assess the effects of the space environment on materials, living matter, and various space systems (1). The saga of this remarkable vehicle is continuing to unfold through a series of symposia, workshops, and journal articles (2-7). Perhaps as much as 90% of our first-hand knowledge of LEO space environmental effects rests with the LDEF and its contents (8).

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Thermal and photo‐oxidation of polysulfone

Cited by 65 publications

References 6 publications

Facile evaluation of coating thickness on membranes using ATR-FTIR

Facile evaluation of coating thickness on membranes using ATR-FTIR

The effect of UV irradiation on PSf/TiO2 mixed matrix membrane for chromium rejection

Molecular-Level Response of Selected Polymeric Materials to the Low Earth Orbit Environment

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