| Title | Gamma irradiation of food packaging materials: An NMR study |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2000 |
| Authors | Pentimalli, Marzia, Capitani D., Ferrando A., Ferri D., Ragni P., and Segre A.L. |
| Journal | Polymer |
| Volume | 41 |
| Pagination | 2871-2881 |
| ISSN | 00323861 |
| Keywords | acrylonitrile, Antioxidants, article, carbon nuclear magnetic resonance, Copolymers, Food packaging material, gamma irradiation, Gamma rays, Gel permeation chromatography, molecular stability, Nuclear magnetic resonance spectroscopy, packaging material, Packaging materials, Plastic containers, Polyacrylonitriles, Polybutadienes, polymer, polystyrene, Polystyrenes, proton nuclear magnetic resonance, Stabilizers (agents), strength |
| Abstract | The effects of γ irradiation on polymers used in food packaging have been studied by NMR. In order to assess the presence of a threshold dose for an observable effect, the whole range of 1-100 kGy was investigated. Polystyrene, poly-butadiene, styrene-acrylonitrile, high-impact polystyrene and acrylonitrile-butadiene-styrene were studied before and after the γ irradiation treatment and in the presence or in the absence of antioxidants and stabilizers. In the absence of stabilizers, the effect of γ irradiation on polystyrene is negligible even when operating at high doses. In contrast, the role of antioxidants and stabilizers is crucial in poly-butadiene and butadiene-containing copolymers. High-resolution NMR, dynamic mechanical analysis, impact analysis and gel permeation chromatography performed on irradiated polystyrene samples do not show any detectable effect, confirming polystyrene as an ideal polymer for food packaging use. The effects of γ irradiation on polymers used in food packaging have been studied by NMR. In order to assess the presence of a threshold dose for an observable effect, the whole range of 1-100 kGy was investigated. Polystyrene, poly-butadiene, styrene-acrylonitrile, high-impact polystyrene and acrylonitrile-butadiene-styrene were studied before and after the γ irradiation treatment and in the presence or in the absence of antioxidants and stabilizers. In the absence of stabilizers, the effect of γ irradiation on polystyrene is negligible even when operating at high doses. In contrast, the role of antioxidants and stabilizers is crucial in poly-butadiene and butadiene-containing copolymers. High-resolution NMR, dynamic mechanical analysis, impact analysis and gel permeation chromatography performed on irradiated polystyrene samples do not show any detectable effect, confirming polystyrene as an ideal polymer for food packaging use. |
| Notes | cited By 35 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0342614904&doi=10.1016%2fS0032-3861%2899%2900473-5&partnerID=40&md5=fdb248194afabba4cbbc7034a9bd6bdf |
| DOI | 10.1016/S0032-3861(99)00473-5 |
| Citation Key | Pentimalli20002871 |
