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Journal: Theory and practice of meat processing (Vol.2, No. 2)

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Authors : ; ; ; ; ; ;

Page : 37-42

Keywords : γ-irradiation; radiation sterilization; polyethylene; polyamide; ethylene vinyl acetate; polymer films; IR spectrum;

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The polymer material (РА/РЕ/Eva) with a width of 55 μm was studied. Sterilization was carried out on the unit GU–200 at doses from 3 to 18 kGy in the Research Institute of Technical Physics and Automation, Rosatom, Moscow, Russia. The structure of the polymer material samples was studied by IR spectroscopy before and after irradiation in a range of 400–5000 сm–1. According to the results of the analysis of the IR spectrum structure, the changes in the structure were insignificant upon irradiation at doses up to 6 kGy. Upon irradiation at doses from 9 kGy and higher, an increase in quantity of ester groups (2340 сm–1) and insignificant increase in other functional groups were observed, which can suggest a simultaneous process of intra-molecular cross-linking with the intermediate stage of cross-linking occurring with formation of vinylene groups. This causes destruction of a polymer material and radiation oxidation. These disorders can lead to changes in physico-mechanical and barrier parameters of a polymer material, which can be notably reflected in the shelf life of agricultural products.

Last modified: 2017-07-14 20:04:52