http://www.cnr.it/ontology/cnr/individuo/prodotto/ID18200
Thermal-oxidative degradation of polyamide 6,6 containing metal salts (Articolo in rivista)
- Type
- Label
- Thermal-oxidative degradation of polyamide 6,6 containing metal salts (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.polymdegradstab.2010.08.014 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Cerruti P; Carfagna C (literal)
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- Pagina fine
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Titolo
- Thermal-oxidative degradation of polyamide 6,6 containing metal salts (literal)
- Abstract
- The thermal-oxidative stability of oven aged polyamide 6,6 (PA6,6) doped with Co, Cu, Ni and Zn
chlorides combined with KI was examined. Aging caused a depression in melting temperature and an
increase in enthalpy of fusion of PA6,6films due to the formation of a strongly degraded crystalline
fractionwith alowermolecularweight.Abuild-upofcarbonylabsorption intherange1700e1780cm ?1
due to primary and secondary photo-oxidation products was detected. The kinetics of carbonyl accumulation
was affected by the morphology of the samples, and it was observed that at a later stage of
aging the crystalline phase was also involved in the oxidation process. The above mentioned changes
were greatest in the case of neat, Co and Ni doped polymer, suggesting that these metal salts acted as
pro-oxidants. On the other hand, the use of Cu and Zn chlorides brought about a substantial increase in
long-term polymer stabilization.
Tensile tests revealed a large reduction in ductility as a result of aging for neat, Co and Ni doped
polymer,whereaslong-termretentionoftensilepropertieswasfoundforthepolymerstabilizedwithCu
andZn.ThepresenceofthemetalsaltscombinedwithKIledtoincreasedstabilizationforchloridesofNi,
and Co, owing to the participation of KI in non-radical decomposition of peroxides. No effect due to KI
was observed for ZnCl 2. (literal)
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