TEMPERATURE EFFECTS ON PERMEATION OF MODIFIED ATMOSPHERE GAS-MIXTURES THROUGH A LOW-DENSITY POLYETHYLENE PACKAGE FILM


TOKATLI K., OZILGEN M.

POLYMER INTERNATIONAL, cilt.30, ss.109-113, 1993 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 30 Konu: 1
  • Basım Tarihi: 1993
  • Doi Numarası: 10.1002/pi.4990300116
  • Dergi Adı: POLYMER INTERNATIONAL
  • Sayfa Sayıları: ss.109-113

Özet

Permeation of CO2 and O2 through a low density polyethylene film was studied with CO2-N2 MiXtures in the temperature range 263-283 K, and with CO2-O2-N2 mixtures in the range 257-313 K. The temperature dependence of the permeabilities of these gases agreed with the Arrhenius expression. The activation energy for carbon dioxide diffusion was between 3.53 x 10(4) and 3.74 x 10(4) J/mol; the activation energy for oxygen diffusion was 3.13 x 10(4) J/mol. The pre-exponential constant for oxygen was higher than that of carbon dioxide in various mixtures. It was also found that the pre-exponential constant of carbon dioxide decreased with increasing CO2 concentration in the mixtures.