Ultraviolet and infrared spectral analysis of irradiated polyethylene films: Correlation and possible application for large-dose radiation dosimetry

Abstract

A detailed study was performed to develop the dosimetric characteristics of commercial low-density polyethylene film (LDPE), which is, by far, the most commonly used plastic for food and for many other-purpose packaging film, to be used as a film dosimeter for large-dose g-radiation dosimetry. The useful dose range extends up to 880 kGy. Correlations were established between the absorbed dose of g-radiation and the radiation-induced changes in LDPE measured using Fourier transform infrared (FTIR) and ultraviolet (UV) spectrophotometry. The results showed a significant dependence of the response on the selected readout tool of measurements whether FTIR (at 1716 cm 01 ) or UV (at 220 and 270 nm) as well as on the quantity used for calculation. The radiation-chemical yield of the ketonic carbonyl group produced in irradiated LDPE film was found to be 0.7 mmol/J. The assessment of the random uncertainty associated with the measurement of the dose response and the effect of relative humidity during irradiation on the dosimeter performance as well as the postirradiation stability at different storage conditions are discussed.

Structure-property behavior of polyethylene exposed to different types of radiation

“…2(b)–4(b)]. These bands are attributed to CC stretching, OH bending, symmetric deformation of CH 2 (wagging), and CH deformation, respectively. The following bands, 965, 1299, 1373, 1411, 1716, and 1879 cm −1 , had been monitored in a previous work describing the correlation and possible application for large dose‐radiation dosimetry 13 The appearance of a broad band which is very obvious at high γ‐radiation‐absorbed dose in the range of 3100–3580 cm −1 [see Figs.…”

Efficiency of peroxyderivatives in the chemical modification of polyethylene

“…The heating of several samples of neat polyethylene during 2.5 h at 160°C produced each time a ketone on the polymeric backbone. Abdel-Fattah 23 and McKellop 24 identified, in the aging of polyolefins, the formation of hydroperoxides, which, by thermal decomposition, generated the ketone. This observation could explain the presence of such a function on the polyethylene after heating.…”

Melt functionalization of linear low‐density poly(ethylene) with succinimide and N‐hydroxy succinimide by thermolysis method

“…Polypropylene (PP) was functionalized with peroxy esters under molten condition with simultaneous cross‐linking 6. Benzoyl peroxide mediated functionalization of LLDPE by tetra hydro phthalic anhydride and maleic anhydride had reported by Campos et al7 The carbonyl functionalization by γ‐radiation dosimetry of LDPE was reported 8. Fodor et al9 determined the carbonyl containing functional groups in the oxidized polyethylene.…”