Changes in physicochemical and mechanical properties of γ-irradiated polypropylene syringes as a function of irradiation dose |
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| Affiliation: | 1. Department of Chemical Engineering, Thapar University, Patiala 147004, Punjab, India;2. Department of Computer Science and Engineering, Thapar University, Patiala 147004, Punjab, India;1. Johannes Kepler University Linz, Institute of Analytical Chemistry, Altenberger Straße 69, 4040, Linz, Austria;2. Johannes Kepler University Linz, Institute of Organic Chemistry, Altenberger Straße 69, 4040, Linz, Austria;3. Johannes Kepler University Linz, Institute of Polymeric Materials and Testing, Altenberger Straße 69, 4040, Linz, Austria;4. AGRU Kunststofftechnik GmbH, Ing.-Pesendorfer-Straße 31, 4050, Bad Hall, Austria;1. IFP Energies Nouvelles–Lyon, Direction Physique et Analyse, Rond-Point de l’échangeur de Solaize, BP3–69360 Solaize France;2. Institut des Sciences Analytiques, CNRS UMR 5280, Université de Lyon, 5 rue de la Doua, 69100 Villeurbanne France;1. Johannes Kepler University Linz, Institute of Analytical Chemistry, Altenberger Straße 69, 4040 Linz, Austria;2. Johannes Kepler University Linz, Institute of Organic Chemistry, Altenberger Straße 69, 4040 Linz, Austria;3. Johannes Kepler University Linz, Institute of Polymeric Materials and Testing, Altenberger Straße 69, 4040 Linz, Austria |
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| Abstract: | The effect of γ-irradiation on mechanical, thermal, physicochemical and structural properties of polypropylene (PP) syringes was studied. Irradiation doses of 30, 60 and 120 kGy were used with non-irradiated PP syringes serving as control samples. Irradiation caused a significant deterioration in mechanical properties of samples. The compression strength of whole syringe body decreased with increasing irradiation dose. Similarly % extension at break decreased with increasing irradiation dose. Of the physicochemical properties tested, both degree of yellowness and extractable radiolysis products increased with increasing irradiation dose. Melting temperature as well as specific melting enthalpy decreased with increasing irradiation dose. Minor differences in FTIR spectra were observed, mainly in the region of 1720 cm−1, corresponding to the absorption of carbonyl compounds indicating the formation of increased amounts of oxidation products at high irradiation doses. Gas chromatography- mass spectroscopy analysis indicated the formation of a number of radiolysis compounds as a result of irradiation. The number and concentration of these compounds increase progressively with increasing dose until 60 kGy. At the same time a number of compounds initially present in non-irradiated syringes were destroyed by irradiation. |
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