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Gas permeability of gamma-irradiated polyethylene and polypropylene films (CROSBI ID 585976)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Klepac, Damir ; Ščetar, Mario ; Galić, Kata ; Valić, Srećko Gas permeability of gamma-irradiated polyethylene and polypropylene films // POLYCHAR 20, World Forum on Advanced Materials, Book of Abstracts / Rogošić, Marko ; Macan, Jelena (ur.). Zagreb: Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, 2012. str. 256-256

Podaci o odgovornosti

Klepac, Damir ; Ščetar, Mario ; Galić, Kata ; Valić, Srećko

engleski

Gas permeability of gamma-irradiated polyethylene and polypropylene films

Linear low density polyethylene (PE-LLD) and cast polypropylene (PPcast) films were irradiated by γ-irradiation. The total irradiation dose varied from 0 kGy (for nonirradiated samples) to 200 kGy. Oxygen transport was investigated by a manometric method and the structural changes were studied by differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). The results show that the γ-irradiation slightly reduces oxygen permeability coefficient in both films. The reduction was associated with an increase in crystallinity. DSC thermograms revealed a decrease in PPcast melting temperature with irradiation dose indicating higher degradation compared to polyethylene. The observed peak in FTIR spectra for both samples at 1716 cm-1 corresponds to the stretching of the carbonyl and carboxylic groups which arise from the reaction of oxygen with the free radicals produced in the polymer matrix as a result of irradiation.

gas permeability; polyethylene; polypropylene; gamma-irradiation; FTIR; DSC

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Podaci o prilogu

256-256.

2012.

objavljeno

Podaci o matičnoj publikaciji

POLYCHAR 20, World Forum on Advanced Materials, Book of Abstracts

Rogošić, Marko ; Macan, Jelena

Zagreb: Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu

978-953-6470-57-0

Podaci o skupu

POLYCHAR 20

poster

26.03.2012-30.03.2012

Dubrovnik, Hrvatska

Povezanost rada

Kemija, Prehrambena tehnologija