Changes in physicochemical and mechanical properties of electron-beam irradiated polypropylene syringes as a function of irradiation dose |
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| Institution: | 1. Laboratory of Food Chemistry and Technology, Department of Chemistry, University of Ioannina, Ioannina GR 45110, Greece;2. Federal Research Center for Nutrition and Food, Institute of Process Engineering, Haid-und-Neu-strasse 9, D 76131 Karlsruhe, Germany;1. Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA;2. National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;1. School of Materials Science and Engineering, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, PR China;2. Analysis and Measurement Center, Tianjin University, Tianjin 300072, PR China;1. Centro Studi Nucleari Enrico Fermi, Dipartimento di Energia, Politecnico di Milano, Via Ponzio 34/3, 20133 Milano, Italy;2. GDS-SIRCI, Via degli Artigiani 27, 06024 Gubbio (PG), Italy;3. Tecnimont S.p.A., Maire Tecnimont Group, Via De Castillia 6A, 20124 Milano, Italy |
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| Abstract: | In the present study, the effect of electron-beam irradiation on physicochemical and mechanical properties of polypropylene (PP) syringes was studied. Three irradiation doses (30, 60 and 120 kGy) were applied to all samples. Non-irradiated PP syringes were used as control samples. Electron-beam irradiation caused an increase in the degree of yellowness and in the extractable radiolysis products. A decrease in compression strength and extension at break was the result of electron-beam irradiation on mechanical properties of PP syringes. Minor differences were observed in FTIR spectra, mainly in the region of 1720 cm−1, corresponding to the absorption of carbonyl compounds. Gas chromatography/mass spectrometry (GC/MS) analysis indicated the formation of a number of radiolysis compounds while a number of compounds initially present in non-irradiated syringes were destroyed by the irradiation. The degradation on polymer properties caused by electron-beam irradiation was less severe than that caused by gamma irradiation. |
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