| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1232778 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2012 | 5 Pages |
The low density polyethylene (LDPE) films were irradiated with gamma radiation in the dose range varied from 20 to 400 kGy. The induced changes in the chemical structure and dielectric properties for the irradiated films were investigated. The structure modifications: crystallinity as well as possible molecular changes of the polymer were recognized using Fourier Transform Infrared Spectroscopy (FTIR). The optical results were determined from transmission, reflection and absorption spectra for these films. The dielectric properties of these films were calculated using optical methods. Result indicates small variation in crystallinity which could be increased or decreased depending on the relative importance of the structural and chemical changes.
Graphical abstract. Polyolefins are plastics of great commercial and economic importance. Among these are polyethylenes, especially, low density polyethylene polymer (LDPE). It exhibits a wide range of properties such as light weight, chemical resistance, flexibility, toughness, good dielectric properties, thermal stability, electrical insulation, heat shrinkable properties, and relatively low cost compared with other plastics, which make it suitable for many applications. As the importance of LDPE, we study the optical and FTIR properties of LDPE, and concern the study to determine the optical energy gap (direct and indirect) dependence on the gamma radiation dose, as shown in figure above, it was seen that the radiation dose plays an important role in the change of the energy gap of these samples.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlight► Spectroscopic studies, structural and optical studies on low density polyethylene (LDPE) films. ► FTIR spectroscopic characterization. ► Optical characterization of low density polyethylene (LDPE) films. ► Energy gap and absorption coefficient. ► Dielectric properties of low density polyethylene (LDPE) films.
