Effect of electron-beam and gamma-irradiation on physicochemical and mechanical properties of polypropylene syringes as a function of irradiation dose: Study under vacuum

Fintzou, Athanasia T.; Kontominas, Michael G.; Badeka, Anastasia V.; Stahl, Mario; Riganakos, Kyriakos A.

doi:10.1016/j.radphyschem.2006.11.009

Cited by 54 publications

(25 citation statements)

References 26 publications

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“…Electron beam irradiation has been used to sterilize medical goods for well over 50 years [119,135,136]. Because of its convenience and low cost, it provides an interesting and preferable alternative sterilization method compared to high-temperature steam autoclaving or dry heat that can damage materials, induce degradation and lead to losses of both shape and mechanical properties.…”

Section: Electron Beam Irradiationmentioning

confidence: 99%

Physico-chemical ageing of ethylene–norbornene copolymers: a review

et al. 2017

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The main object of this report is to review and summarize the current state of the scientific literature relating to physico-chemical ageing of ethylene-norbornene copolymers (ENCs). These processes occur through different means such as photodegradation under the effect of ultraviolet radiation, temperature and ionizing radiation (under air or oxygen). In most cases ageing causes chains scissions that lead to the creation of degradation compounds that exhibit high mobility, corresponding to their low molecular weight and/or high polarity. Cross-linking can also occur, leading to the modification of mechanical properties. The presence of oxygen during ageing is of great importance for the physico-chemical modifications of those polymers in terms of oxidation and thermal stability. ENCs belong to cyclic olefin copolymers (COC) class, whose synthesis was developed in the late 1950s. Nevertheless, commercial applications are relatively new. They attract growing interest in different fields, due to their very useful physical and chemical properties such as transparency, heat and chemical resistance, low permeability to gas as well as biocompatibility. In the literature, a large number of papers deal with the synthesis and characterization of different grades of ENC, but only a few deal with the effects of ageing on these materials. This literature review consists of a summary of the main milestones in the development of COC as well as of cyclic olefin polymers (COP), a review of main techniques for predicting ageing, degradation of additives and interaction between COC/COP and contact environment as well as toxicity of the extractables.

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Section: Electron Beam Irradiationmentioning

confidence: 99%

Physico-chemical ageing of ethylene–norbornene copolymers: a review

et al. 2017

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“…In particular, the gamma irradiation caused a decrease of approximately 95% in the viscosity of the 3% CMC solution at 30 kGy. The time needed for an electron beam irradiation is less than that for a gamma irradiation at the same absorbed dose, which is due to its high dose rate, and this resulted in a slight oxidative degradation due to a limited oxygen diffusion into the CMC [4,10,11]. Therefore, the degradation of the CMC by the electron beam was less than that by the gamma ray.…”

Section: Change In the Viscosity Of Cmc Solution By Electron Beam Irrmentioning

confidence: 99%

“…Also, the protective effect on the relative viscosity by the addition of a vitamin C and a frozen irradiation was much less in the case of the electron beam irradiation than that of the gamma ray irradiation. It was reasoned that an oxidative degradation was efficiently prevented by the addition of vitamin C and by a frozen irradiation in the case of the gamma irradiation [10,16]. In other words, a high energy of an electron beam in a short time causes a higher number of radicals, and a low concentration level of oxygen cannot oxidize that amount, whereas for gamma rays this is the case.…”

Section: The Effect Of Addition Of Vitamin C and Low Temperature Irramentioning

confidence: 99%

Effect of electron beam irradiation on the viscosity of carboxymethylcellulose solution

Choi

Lee

Kim

et al. 2008

Nuclear Instruments and Methods in Physics Research Section B:

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“…They also cite the work of Gillen and Clough (1991) which showed that it is the amount of oxygen diffusion that leads to the oxidative degradation products which varies for these two irradiation method. Fintzou et al (2007b) in a subsequent study used g-and electron beam irradiation of samples under vacuum.…”

Section: Introductionmentioning

confidence: 99%