Electron beam irradiations of polypropylene syringe barrels and the resulting physical and chemical property changes

Abraham, Ann C.; Czayka, M.; Fisch, Michael R.

doi:10.1016/j.radphyschem.2009.08.027

Cited by 19 publications

(6 citation statements)

References 23 publications

(30 reference statements)

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“…The melt acts as an ideal viscous matrix when δ is 90°, and as an ideal elastic matrix when δ is 0°. , The vGP diagram in Figure a shows that the δ of the nanocomposites is significantly smaller than that of pristine PPS, and the higher the PTFE content, the more complete the network structure, that is, smaller δ. The Cole–Cole curve in Figure b is used to analyze the rheological behavior of the molecular chain relaxation. , The Cole–Cole curve of pristine PPS is nearly semicircular, while the curve of the nanocomposite is closer to linear. With the increase of PTFE content, the curve goes upward, indicating a more difficult molecular chain relaxation.…”

Section: Resultsmentioning

confidence: 99%

“…The Cole−Cole curve in Figure 6b is used to analyze the rheological behavior of the molecular chain relaxation. 48,49 The Cole−Cole curve of pristine PPS is nearly semicircular, while the curve of the nanocomposite is closer to linear. With the increase of PTFE content, the curve goes upward, indicating a more difficult molecular chain relaxation.…”

Section: In Situ Fibrillation Of Ptfe In Ppsmentioning

confidence: 97%

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Ultrahigh Terahertz Signal Transmittance of PTFE@PPS Nanocomposite Foam Designed for Terahertz Antennas

Chen,

Zhang,

Gao

et al. 2023

Ind. Eng. Chem. Res.

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The urgent requirement for ultrahigh Terahertz (THz) transmittance in sixth-generation (6G) communication demands specifically developed low-dielectric material with low THz signal loss, and the most efficient method is to take full advantage of ultralow dielectric air to reduce the THz loss of the dielectric material. Therefore, finding a way to introduce air into the matrix and maintain the stability of the corresponding air structure is the key issue for the preparation of ultralow THz loss dielectric material. In this work, low-dielectric poly(tetrafluoroethylene) (PTFE) (D f of only 0.0004) was selected to form in situ nanofibers to regulate the viscoelasticity of polyphenylene sulfide (PPS) with excellent comprehensive performance in fifth-generation (5G) communication, and the nonresidual supercritical CO2 foaming method was applied to introduce a large amount of ultralow dielectric air into the PTFE@PPS nanocomposite. The obtained PTFE@PPS nanocomposite microcellular foam had excellent low-dielectric properties (D k = 1.19, D f = 0.000255) at THz frequency and, correspondingly, an ultrahigh THz transmission (≥90%). For a THz patch antenna, the THz signal transmission was merely 53.5 m when solid PPS was used as the substrate. When the substrate was changed to the PTFE@PPS nanocomposite microcellular foam specifically developed in this work, the available distance for THz signal transmission increased 9 times to 456.1 m. Furthermore, compared with the contact angle of solid PPS (84.6°), the obtained PTFE@PPS nanocomposite microcellular foam has a superior hydrophobic performance with a contact angle of 135.4°. The strategy applied in this work thus effectively guides the fabrication of low THz signal loss material for 6G communication.

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Section: Resultsmentioning

confidence: 99%

Section: In Situ Fibrillation Of Ptfe In Ppsmentioning

confidence: 97%

Ultrahigh Terahertz Signal Transmittance of PTFE@PPS Nanocomposite Foam Designed for Terahertz Antennas

Chen,

Zhang,

Gao

et al. 2023

Ind. Eng. Chem. Res.

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“…It is known that free radicals undergo decay with time after irradiation [43,44]. Therefore, a study on the stability of the free radicals created by irradiation would help in deciding the morphology of the particulate films.…”

Section: Resultsmentioning

confidence: 99%

Morphological changes in nanoparticulate silver films due to electron beam irradiation of polystyrene substrates

Pattabi

Gurumurthy

Sanjeev

et al. 2011

Nuclear Instruments and Methods in Physics Research Section B:

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“…Poly(propylene) is also extensively used for medical supplies and packaging applications that requires to undergo sterilization (Auhl et al, 2004;Fintzou et al, 2006;Abraham A.C. et al, 2010;Makuuchi et al, 2012;Portnoy, 1996Portnoy, , 1999Portnoy et al, 2007). Because of its high content of tertiary carbons, PP lies in the category of polymers that predominantly undergo scissioning when it is irradiated.…”

Section: Introductionmentioning

confidence: 99%

Rheological analysis of irradiated crosslinkable and scissionable polymers used for medical devices under different radiation conditions

Satti

Ressia

Cerrada

et al. 2018

Radiation Physics and Chemistry

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The effects on different synthetic polymers of distinct types of radiation, gamma rays and electron beam, under different atmospheres are followed by changes in their viscoelastic behavior. Taking into account the two main radioinduced reactions, crosslinking and scissioning of polymeric chains, liquid polydimethylsiloxane has been used as example of crosslinkable polymer and semi crystalline polypropylene as example of scissionable polymer. Propylene-1-hexene copolymers have been also evaluated, and the effects of both reactions were clearly noticed. Accordingly, samples of those aforementioned polymers have been irradiated with 60 Co gamma irradiation in air and under vacuum, and also with electron beam, at similar doses. Sinusoidal dynamic oscillation experiments showed a significant increase in branching and crosslinking reactions when specimens are irradiated under vacuum, while scissioning reactions were observed for the different polymers when irradiation takes place under air with either gamma irradiation or electron beam.

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Electron beam irradiations of polypropylene syringe barrels and the resulting physical and chemical property changes

Cited by 19 publications

References 23 publications

Ultrahigh Terahertz Signal Transmittance of PTFE@PPS Nanocomposite Foam Designed for Terahertz Antennas

Ultrahigh Terahertz Signal Transmittance of PTFE@PPS Nanocomposite Foam Designed for Terahertz Antennas

Morphological changes in nanoparticulate silver films due to electron beam irradiation of polystyrene substrates

Rheological analysis of irradiated crosslinkable and scissionable polymers used for medical devices under different radiation conditions

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