Total luminescence intensity (TLI) offers superior early oxidation detection in unstabilised polyethylene but is no better than FT-IR for stabilised polyolefins

Thermal aging kinetic and effects on mechanical behavior of fully recycled composite based on polypropylene/polyethylene blend

“…In fact, this latter can be consumed not only by chemical reactions but also lost by extraction or evaporation and many researches have been realized studying its effect on polymers ageing in terms of its induction period and its consumption rate . In order to be able to detect antioxidants, follow their disappearance and carbonyls build up, many analytical methods are proposed in literature such as IR and UV spectrophotometry and differential scanning calorimetry (DSC) under oxygen (OIT) . Coupling the chemical consumption and physical loss of stabilizers and proposing valid kinetic models is a complex and interesting field that's why in recent years many researchers have been attracted to study it …”

Kinetic modelling of phenols consumption during polyethylene thermal oxidation

“…For that purpose, two approaches can be envisaged: -Analytical methods: spectroscopic, chromatographic or thermal detection of stabilizer and its by-products [2,3]. The measurement of Oxidation Induction Time by DSC under oxygen is one of most popular methods because of its simplicity [4,5,6]. …”

“…We already obtained promising results in comparable studies for hydroperoxides decomposers [13,14] but it was in case of a major volatile loss so that it is not sure that the stabilizer depletion only due to chemical reaction is accurately simulated. Since Oxidation Induction Time measurement (by Chemiluminescence or DSC) is a commonly employed [4][5][6], we will try to discuss on the reliability of this method for determining the residual quantity of stabilizer in polymer after exposure.…”

Invariant electrical conductivity upon thermal ageing of a crosslinked copolymer blend for high voltage insulation

“…3a). [31][32][33] Instead, ageing did not significantly affect the FTIR spectra of the cured blend with the antioxidant (Fig. 3a), indicating that the presence of 0.1 wt% Irganox is able to suppress the oxidation of the cured blend.…”