Accelerated photo-oxidation of Polyamide 11 nanocomposites under various clays nanofillers

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Accelerated photo-oxidation of Polyamide 11 nanocomposites under various clays nanofillers

Dehouche, Nadjet; Kaci, Mustapha; Focke, Walter Wilhelm; Van der Merwe, Liezel
URI: http://hdl.handle.net/2263/92092
Date: 2022-08

Abstract:

The effect of various clays nanofillers on the photo-oxidation of polyamide 11 (PA11) has been investigated by accelerated ultraviolet (UV) test up to 780 h. Organo-modified montmorillonite, halloysite nanotubes, and sepiolite were selected and incorporated separately to PA11 at 5 wt.%. The samples were prepared by melt compounding. Fourier transform infrared (FTIR) data showed a linear increase of carbonyl index (CI) in the first 360 h of exposure indicating a rapid oxidation of all samples without any induction period. Further, the nanocomposite samples exhibit faster oxidation kinetics than PA11, being however less pronounced for PA11/sepiolite. This is consistent with both the yellowing index (YI) evolution determined by UV–Vis spectroscopy and also the onset oxidation temperature (OOT) determined by differential scanning calorimetry (DSC).

Description:

DATA AVAILABILITY STATEMENT : Data available on request from the authors.

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