Gamma Radiation Induced Modifications on Physicochemical Properties of Makrofol (KG and N) Polycarbonate

Abstract

Makrofol (KG and N) polycarbonates (PCs) are the most versatile solid-state nuclear track detectors. These polymers were exposed to gamma radiation of doses ranging from 250 to 1000 kGy. The pristine and exposed samples were characterized by X-ray diffraction (XRD), UV-vis spectrophotometry, and Fourier transform infrared spectrophotometry for the structural, optical, and chemical studies, respectively. The XRD studies showed that crystallite size for exposed samples of makrofol-KG PC decreased from 64.7 to 57.9Å and for makrofol-N PC it increased from 19.1 to 21.1Å. The band gap energy decreased from 4.40 to 4.07 eV for makrofol-KG and from 4.26 to 3.83 eV for makrofol-N after the gamma exposure. The number of carbon atoms per conjugation length as obtained from UV-vis studies was increased in both cases. The activation energy showed fluctuations for exposed samples of both polymers. The intensity of various absorption bands of the infrared spectra decreased at some doses for both the PCs, indicating the change in the chemical properties of the exposed samples. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2015, 34, 21510; View this article online at wileyonlinelibrary.com.

Tailoring the optical properties of PC/ZnS nanocomposite by γ radiation

“…This may due to the development of conjugated bonds. Therefore, the E g is predictable to be reduced as the radiation doses g increase [46]. The creation of conjugated bonding has been activated owing to the tiny size of ZnS NPs that decreases the atomic volume taken by NPs, thus its density increases and hence the absorption improves [47].…”

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Effect of gamma radiation on the structure and thermal properties of polyaniline-cobalt/polycarbonate nanocomposite

“…No peaks appeared for Co indicating the incorporation of Co in the NCP matrix. There is slight change in the position of the wide peak after the NCP samples were exposed to ; indicating that the lattice parameters were broken [24].…”

“…3b). The decrease in the L values can be owing to the creation of free radicals, chain scission, and crosslinking of the polymeric NCP chains upon irradiation [24].…”

The Influence of Environmental Stress Cracking (ESC) and Gamma Irradiation on the Mechanical Properties of Polycarbonate: Study of Synergistic Effects

“…Nowadays, the use of ionizing radiation in polymer industry is mainly related with radio sterilization of medical artifacts and induced crosslinking of wires and cables 3,9,16 . However, in nuclear power plants or nuclear medicine laboratories, objects made or that contain polycarbonate may be exposed to gamma radiation [17][18][19][20][21][22][23] . Thus, to investigate polymers that are irradiated in a variety of conditions provides detailed information about many processes that occur between the initial energy absorption and the final physical and chemical changings.…”