Abstract
The mitigation of oxidative degradation under γ-irradiation promoted by eight commercial antioxidants: Ethanox 330, Hostanox O3, Irganox 1010, Topanol OC, Ionox 220, Santonox R, Santowhite, Cyanox 2246 loaded onto ethylene–propylene terpolymer at the concentration of 0.5 phr in respect of a pristine polymer was studied. The polymer samples were exposed to various doses up to 500 kGy. The kinetic parameters of oxidations: oxidation induction times, onset oxidation temperature, oxidation rates were evaluated by CL measurements. They validated the differences in the stabilisation activities by limitation of the oxidation gradient. The high efficiency of some of the antioxidants studied, such as Ionox 220 and Santowhite, ensured the delay in degradation even at a high irradiation dose (500 kGy). For the environments with γ-radiation exposure, a relevant sequence in the increasing protection efficiency could be established: Topanol OC; Hostanox 03; Irganox 1010; Cyanox 2246; Santonox R; Ionox 220; Santowhite. The FT-IR spectra were recorded for the calculation of the radiochemical yields resulting from the modifications occuring in the concentrations of oxygenated structures. The accumulations of hydroxyl- and carbonyl-containing products were calculated to evaluate the irradiation effects in EPDM-based products during a severe accident. The options for EPDM stabilisation are discussed based on chemiluminescence and FTIR analyses.
* Corresponding author, e-mail: traian zaharescu@yahoo.com
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© 2015 Institute of Chemistry, Slovak Academy of Sciences
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- Original Paper
- Prevention of degradation of γ-irradiated EPDM using phenolic antioxidants
- Original Paper
- Differentiation of black, green, herbal and fruit bagged teas based on multi-element analysis using inductively-coupled plasma atomic emission spectrometry
- Original Paper
- Reaction mechanisms of carbon dioxide methanation
- Review
- Power consumption and gas–liquid dispersion in turbulently agitated vessels with vertical dual-array tubular coil baffles
- Short Communication
- Tannins analysis from different medicinal plants extracts using MALDI-TOF and MEKC
- Original Paper
- Trihexyl(tetradecyl)phosphonium bromide as extractant for Rh(III), Ru(III) and Pt(IV) from chloride solutions‡
- Original Paper
- Synthesis of Fe3O4–Ag nanocomposites and their application to enzymeless hydrogen peroxide detection
- Original Paper
- Possibilities for removal of chlorinated dye Mordant Blue 9 from model waste water‡
- Review
- Preparation and properties of gelatin films incorporated with N-hydroxysuccinimide-activated end-bit binary acid
- Original Paper
- Synthesis and properties of novel reusable nano-ordered KIT-5-N-sulfamic acid as a heterogeneous catalyst for solvent-free synthesis of 2,4,5-triaryl-1 H-imidazoles
- Short Communication
- Prediction of power consumption in mechanically agitated gassed reactor in viscous batch‡
- Original Paper
- Hydrogel supported chiral imidazolidinone for organocatalytic enantioselective reduction of olefins in water
- Original Paper
- Continuous synthesis of N-ethylethylenediamine over supported Cu–Zn–La catalysts
- Preface
- Enzyme-assisted extraction of citrus essential oil
- Preface
- Experimental investigations of liquid flow in pipe with flat internal baffles