Details
| Original language | English |
|---|---|
| Pages (from-to) | 25-31 |
| Number of pages | 7 |
| Journal | KGK Kautschuk Gummi Kunststoffe |
| Volume | 65 |
| Issue number | 3 |
| Publication status | Published - Mar 2012 |
| Externally published | Yes |
Abstract
The consumption, the efficiency depending on the molecular structure, the generation of active intermediates and the fate of p-phenylenediamines during thermal-oxidative aging were investigated in rubbers and model systems. By means of OIT determinations, a high correlation could be shown between the effectiveness of the antioxidants and the type of substituents at the nitrogen atom. Activation energies and rate constants of the antioxidant consumption were determined. Dependent on aging-time the identification of the reaction product results in aldehyde adducts of the corresponding PPD. Investigations on 6PPD/squalenebased model systems by means of chemiluminescence, FT-IR, GC-MS and LC-MS led to hydroxylated squalene derivatives and aldehyde adducts. CL is useful for short term characterization of thermal-oxidative aging processes.
Keywords
- Antioxidant consumption, Chemiluminescence, Efficiency of p-phenylenediamines, Thermal oxidative aging
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Polymers and Plastics
- Engineering(all)
- Industrial and Manufacturing Engineering
- Materials Science(all)
- Materials Chemistry
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In: KGK Kautschuk Gummi Kunststoffe, Vol. 65, No. 3, 03.2012, p. 25-31.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Consumption and reaction mechanisms of antioxidants during thermal oxidative aging
AU - Torrejón, Y. Navarro
AU - Giese, U.
PY - 2012/3
Y1 - 2012/3
N2 - The consumption, the efficiency depending on the molecular structure, the generation of active intermediates and the fate of p-phenylenediamines during thermal-oxidative aging were investigated in rubbers and model systems. By means of OIT determinations, a high correlation could be shown between the effectiveness of the antioxidants and the type of substituents at the nitrogen atom. Activation energies and rate constants of the antioxidant consumption were determined. Dependent on aging-time the identification of the reaction product results in aldehyde adducts of the corresponding PPD. Investigations on 6PPD/squalenebased model systems by means of chemiluminescence, FT-IR, GC-MS and LC-MS led to hydroxylated squalene derivatives and aldehyde adducts. CL is useful for short term characterization of thermal-oxidative aging processes.
AB - The consumption, the efficiency depending on the molecular structure, the generation of active intermediates and the fate of p-phenylenediamines during thermal-oxidative aging were investigated in rubbers and model systems. By means of OIT determinations, a high correlation could be shown between the effectiveness of the antioxidants and the type of substituents at the nitrogen atom. Activation energies and rate constants of the antioxidant consumption were determined. Dependent on aging-time the identification of the reaction product results in aldehyde adducts of the corresponding PPD. Investigations on 6PPD/squalenebased model systems by means of chemiluminescence, FT-IR, GC-MS and LC-MS led to hydroxylated squalene derivatives and aldehyde adducts. CL is useful for short term characterization of thermal-oxidative aging processes.
KW - Antioxidant consumption
KW - Chemiluminescence
KW - Efficiency of p-phenylenediamines
KW - Thermal oxidative aging
UR - http://www.scopus.com/inward/record.url?scp=84873019197&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84873019197
VL - 65
SP - 25
EP - 31
JO - KGK Kautschuk Gummi Kunststoffe
JF - KGK Kautschuk Gummi Kunststoffe
SN - 0948-3276
IS - 3
ER -