Quantiﬁcation of hindered phenols in polyamide 11 during thermal aging
TypeArticles dans des revues avec comité de lecture
Polyamide 11 ﬁlms stabilized by Irganox® 1098, Irganox® 1010 or Irganox® 245 were subjected to thermal oxidation at 110°C. The residual phenol content was assessed by comparing three analytical methods:high performance liquid chromatography (HPLC), determination of the Oxidation Induction Time (OIT)and Onset Oxidation Temperature (OOT) by thermal analyses. Both OIT and OOT are reliable for virgin PA11 after a relevant calibration by HPLC measurement. In the case of oxidized samples, OOT measurements have the beneﬁts of being more easily interpretable than OIT and less time-consuming than HPLC measurements.
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OKAMBA-DIOGO, Octavie; RICHAUD, Emmanuel; VERDU, Jacques; FERNAGUT, François; GUILMENT, Jean; FAYOLLE, Bruno (Elsevier, 2014)The present article reports a study of thermal oxidation of unstabilized polyamide 11 films at several temperatures (90–165 °C) under atmospheric pressure and under various oxygen pressures (up to 1.6 MPa) at 110 °C. The ...
RICHAUD, Emmanuel; OKAMBA-DIOGO, Octavie; FAYOLLE, Bruno; VERDU, Jacques; GUILMENT, Jean; FERNAGUT, François (Elsevier, 2013)The literature on oxidation kinetics of polyamides and model compounds has been reviewed in order to try to extract suitable information for non-empirical kinetic modeling. Polyamide characteristics are systematically ...
Molecular and macromolecular structure changes in polyamide 11 during thermal oxidation - Kinetic modeling OKAMBA-DIOGO, Octavie; RICHAUD, Emmanuel; VERDU, Jacques; FERNAGUT, François; GUILMENT, Jean; FAYOLLE, Bruno (Elsevier, 2015)The oxidation kinetics of unstabilized polyamide 11 thin ﬁlm under oxygen pressures up to 2.0 MPa was studied by means of ferrous ion method for hydroperoxides titration, size exclusion chromatography (SEC) for molar weight ...
OKAMBA-DIOGO, Octavie; RICHAUD, Emmanuel; VERDU, Jacques; FERNAGUT, François; GUILMENT, Jean; FAYOLLE, Bruno (Elsevier, 2016)Embrittlement processes occurring during thermal oxidation are investigated for stabilized and unstabilized polyamide 11 samples differing by their thicknesses and initial molar masses. Tensile tests were carried out in ...
OKAMBA-DIOGO, Octavie; FERNAGUT, François; GUILMENT, Jean; PERY, Frederique; FAYOLLE, Bruno; RICHAUD, Emmanuel (ELSEVIER, 2020)This paper addresses the effect of hindered phenols (mainly Irganox 1098 with a few comparisons with other phenolic antioxidants) on the stabilization of polyamide 11 aged at several temperatures (90–165 °C). The effect ...