Photooxidation and photodestruction of modified polyamides

Иванов, В. М.; Barashkova, I. I.; Selikhov, V. V.; Vysotsky, V.N.; Yakovlev, Yu. Yu.; Sadekova, R. A.; Barashkov, N. N.

doi:10.1016/0141-3910(92)90035-4

Cited by 10 publications

(2 citation statements)

References 7 publications

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“…However beyond 360 h, the photo‐oxidation rate substantially decreases. For Ivanov et al., [ 12 ] the decline of the imide rate formation at longer exposure time is attributed to the screening action of oxidation products and also by the change in the kinetic characteristics due to the consumption of α‐methylene groups and the formation of new functional groups. Figure 1 also shows that the photo‐oxidation rate of PA11 is affected by the nature of clays, although the curves display the same trend, that is, a hyperbolic shape.…”

Section: Resultsmentioning

confidence: 99%

Accelerated Photo‐Oxidation of Polyamide 11 Nanocomposites under Various Clays Nanofillers

Dehouche

Kaci

Merwe

2022

Macromolecular Symposia

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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).

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Section: Resultsmentioning

confidence: 99%

Accelerated Photo‐Oxidation of Polyamide 11 Nanocomposites under Various Clays Nanofillers

Dehouche

Kaci

Merwe

2022

Macromolecular Symposia

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show abstract

“…Oxygen uptake can be studied by monitoring oxygen consumption in a closed manometric system, 167,185,196,219 by analysis of gas phase by GC, 541 or by titration of carboxylic groups or IR analysis. 167,185 In each case, samples must be exposed in a closed system which permits monitoring and control of the surrounding atmosphere.…”

Section: Oxygen Uptakementioning

confidence: 99%