Study on application of PTFE, FEP and PFA fluoropolymers on radiation dosimetry

Galante, A.M.S.; Galante, O.L.; Campos, L.L.

doi:10.1016/j.nima.2009.10.103

Cited by 61 publications

(23 citation statements)

References 4 publications

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“…It was found that fluoropolymers, including FEP, are very stable when treated with different ambient conditions; the dosimetric wavelength is characteristic for each type of fluoropolymer and a linear correlation was found between gamma radiation dose and optical response [6]. Surface treatment of FEP can be also introduced with several other procedures, on the basis of a particular application, e.g.…”

Section: Introductionmentioning

confidence: 99%

Plasma activated perfluoroethylenepropylene for cytocompatibility enhancement

Slepička

Peterková

Rimpelová

et al. 2016

Polymer Degradation and Stability

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Section: Introductionmentioning

confidence: 99%

Plasma activated perfluoroethylenepropylene for cytocompatibility enhancement

Slepička

Peterková

Rimpelová

et al. 2016

Polymer Degradation and Stability

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“…The length of the tubing coil directly determines the residence time in the reactor. The FEP tubing does not exhibit a significant absorption of visible light [68]; furthermore, the reaction temperature can be easily set and controlled by immersing the reactor coil into a thermostat bath. This set-up is advantageous as the cooling liquid does not absorb any of the incident light before it penetrates the reactor and the outer cooling counters the heat generated by the central lamp.…”

Section: Resultsmentioning

confidence: 99%

A flow reactor setup for photochemistry of biphasic gas/liquid reactions

Schachtner

Bayer

Wangelin

2016

Beilstein J. Org. Chem.

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SummaryA home-built microreactor system for light-mediated biphasic gas/liquid reactions was assembled from simple commercial components. This paper describes in full detail the nature and function of the required building elements, the assembly of parts, and the tuning and interdependencies of the most important reactor and reaction parameters. Unlike many commercial thin-film and microchannel reactors, the described set-up operates residence times of up to 30 min which cover the typical rates of many organic reactions. The tubular microreactor was successfully applied to the photooxygenation of hydrocarbons (Schenck ene reaction). Major emphasis was laid on the realization of a constant and highly reproducible gas/liquid slug flow and the effective illumination by an appropriate light source. The optimized set of conditions enabled the shortening of reaction times by more than 99% with equal chemoselectivities. The modular home-made flow reactor can serve as a prototype model for the continuous operation of various other reactions at light/liquid/gas interfaces in student, research, and industrial laboratories.

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“…Hence, its mechanical properties degrade even at small radiation doses (in air or even under vacuum). Galante et al investigated the radiation tolerance of perfluoroalkoxy (PFA) under vacuum and in oxygen and found it to be higher than that of PTFE (the ratio being 10:1). Hexafluoropropylene (FEP), like other perfluoropolymers, is not highly resistant to radiation.…”

Section: Introductionmentioning

confidence: 99%

Study on electron beam cross‐linked ethylene‐tetrafluoroethylene copolymer‐insulated cables for aerospace applications: Mechanical performance, crystallization kinetics, and fluoride precipitation

Min

Tao²,

Song³

et al. 2018

Polymers for Advanced Techs

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The cross-linking effects of cross-linked ethylene-tetrafluoroethylene copolymer (XETFE)-insulated cables at different electron beam radiation doses were analyzed in this paper. Evaluation of the mechanical performance of the cables revealed that the highest tensile and breaking elongation was achieved at a radiation dose of 8 × 10 4 Gy and that XETFE had a good resistance to extreme electron beam irradiation. This is attributed to the cross-linking effects induced by electron beam irradiation, and this takes full advantage of the strength of molecular chain crosslink to each other. The crystallization kinetics of XETFE at different electron beam radiation doses were studied in detail in terms of the non-isothermal and isothermal crystallization processes. The results indicated that the crystallinity of the XETFE domain increased with an increase in the radiation dose as a result of heterogeneous nucleation. Moreover, the highest ΔE a was obtained, indicating that XETFE absorbed some energy at a radiation dose of 8 × 10 4 Gy. These kinetic parameters had help in carrying out a comprehensive evaluation of the performance of XETFEinsulated cables for aerospace applications. Moreover, the fluoride precipitation observed in this study indicated that upon electron beam irradiation, XETFE could internally produce hydrogen fluoride, which is corrosive to metals. Thus, optimizing the radiation dose was necessary to achieve the desired performance. We could believe that the improvement for properties of electron beam XETFE insulation cables would expand their range of applications in the aerospace field.

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Study on application of PTFE, FEP and PFA fluoropolymers on radiation dosimetry

Cited by 61 publications

References 4 publications

Plasma activated perfluoroethylenepropylene for cytocompatibility enhancement

Plasma activated perfluoroethylenepropylene for cytocompatibility enhancement

A flow reactor setup for photochemistry of biphasic gas/liquid reactions

Study on electron beam cross‐linked ethylene‐tetrafluoroethylene copolymer‐insulated cables for aerospace applications: Mechanical performance, crystallization kinetics, and fluoride precipitation

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