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| Titel: |
The Initiation of Polypropylene Oxidation |
| Auteur: |
Livanova, N. M. Zaikov, G. E. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 36 (1997) nr. 1-2 pagina's 23-31 |
| Jaar: |
1997-04-01 |
| Inhoud: |
The rate of primary initiation of PP oxidation with catalytic centers containing transition metals was evaluated. The rate was determined from the retardation period of the oxidation reaction in the fracture sites of stressed PP films with an inhibitor when the retardation period was close to the value of durability. The number of initiation centers was taken into account. For this purpose, the predicted durability of samples was calculated for the concentration of initiation centers of the polymer without additives. Inhibited PP films with various complexone contents introduced to the polymer to deactivate the catalytic centers were studied. The rate of initiation was shown not to change in the presence of the complexone, while the number of centers changed. The comparison of the oxidation kinetics of samples derived from the oxygen absorption using data from this study showed that the macrokinetic parameters were dependent on the number of the initiation centers. Thus, the kinetic regularities were shown to be related to the catalytic activity of initiation centers and also to their concentration. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 11 gevonden artikelen
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