Irradiation effects on aromatic polymers: 2. Gas evolution during electron-beam irradiation

Hegazy, El‐Sayed A.; Sasuga, Tsuneo; Nishii, Masanobu; Seguchi, Tadao

doi:10.1016/0032-3861(92)90075-8

Cited by 47 publications

(22 citation statements)

References 7 publications

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“…Nevertheless, these reports seem to contradict with each other, that is, some [1][2][3] have reported that PSF irradiated in vacuum environment are mainly degraded by main chain scission, while others [4,5] reported that cross-linking predominates over scission under vacuum in PSF. Thus, both cross-linking and main chain scission were reported for the irradiation effects on PSF.…”

Section: Introductionmentioning

confidence: 81%

“…Many studies have investigated irradiation effect on PSF at high temperature [1][2][3][4][5]. Nevertheless, these reports seem to contradict with each other, that is, some [1][2][3] have reported that PSF irradiated in vacuum environment are mainly degraded by main chain scission, while others [4,5] reported that cross-linking predominates over scission under vacuum in PSF.…”

Section: Introductionmentioning

confidence: 91%

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Gamma-rays irradiation effects on polysulfone at high temperature

Murakami

Kudo

2007

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 91%

Gamma-rays irradiation effects on polysulfone at high temperature

Murakami

Kudo

2007

Nuclear Instruments and Methods in Physics Research Section B:

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“…The properties of Kapton and Ultem, two of the best‐known and most studied commercial polyimides, have been reported to be little affected by high‐energy radiations at relatively low doses at ambient temperature 9. Carbon monoxide and carbon dioxide are the principal gases reported to be evolved on radiolysis of Kapton,10 indicating that radiation damage involves a breakdown of the imide rings. The radiolysis of Ultem at room temperature has also been reported5, 6, 11 to involve imide ring degradation, as well as ether bond scission and reactions at the isopropylidene linkages in this polymer.…”

Section: Introductionmentioning

confidence: 99%

FT‐Raman studies of a range of polyimides subjected to high‐energy radiations at room and elevated temperatures

Devasahayam

Hill

Connell

2006

J of Applied Polymer Sci

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A range of polyimides have been subjected to electron beam radiolysis at different temperatures. These polyimides were chemically designed to suit space applications, being either transparent or having groups which provide oxidation resistance. The structural changes that occur in the polyimides, when subjected to electron beam irradiation doses up to 18.5 MGy and up to temperatures close to their glass transition temperatures, were studied using FTRaman spectroscopy. The range of polyimides studied included a series of perfluoropolyimides, a silicon-modified polyimide, and Ultem. The changes in the Raman peak intensities of the different groups indicated scission reactions involving the imide rings and ether linkages.

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“…The radiation stability of crystalline and amorphous PEEK has been extensively studied for the past two decades due to interest in spacecraft applications and nuclear fusion reactors, where the total exposure to radiation ranges between 10 and 50 MGy (i.e., 10,000 -50,000 kGy) [56,67,[69][70][71][72][73][74][75][76][77]. Although degradation and crosslinking of PEEK occur at doses above 10 MGy, it should be appreciated that the exposures of concern to the aerospace and nuclear power industry exceed the standard sterilization doses for medical devices (25-40 kGy) by three orders of magnitude.…”

Section: Chemical Thermal and Radiation Stability: Implications Formentioning

confidence: 99%

PEEK biomaterials in trauma, orthopedic, and spinal implants

Kurtz

Devine²

2007

Biomaterials

2,022

1,518

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Since the 1980s, polyaryletherketones (PAEKs) have been increasingly employed as biomaterials for trauma, orthopedic, and spinal implants. We have synthesized the extensive polymer science literature as it relates to structure, mechanical properties, and chemical resistance of PAEK biomaterials. With this foundation, one can more readily appreciate why this family of polymers will be inherently strong, inert, and biocompatible. Due to its relative inertness, PEEK biomaterials are an attractive platform upon which to develop novel bioactive materials, and some steps have already been taken in that direction, with the blending of HA and TCP into sintered PEEK. However, to date, blended HA-PEEK composites have involved a trade-off in mechanical properties in exchange for their increased bioactivity. PEEK has had the greatest clinical impact in the field of spine implant design, and PEEK is now broadly accepted as a radiolucent alternative to metallic biomaterials in the spine community. For mature fields, such as total joint replacements and fracture fixation implants, radiolucency is an attractive but not necessarily critical material feature.

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Irradiation effects on aromatic polymers: 2. Gas evolution during electron-beam irradiation

Cited by 47 publications

References 7 publications

Gamma-rays irradiation effects on polysulfone at high temperature

Gamma-rays irradiation effects on polysulfone at high temperature

FT‐Raman studies of a range of polyimides subjected to high‐energy radiations at room and elevated temperatures

PEEK biomaterials in trauma, orthopedic, and spinal implants

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