http://www.cnr.it/ontology/cnr/individuo/prodotto/ID196135
Foams based on poly(ethylene terephthalate) nanocomposites with enhanced thermal stability (Articolo in rivista)
- Type
- Label
- Foams based on poly(ethylene terephthalate) nanocomposites with enhanced thermal stability (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1177/0021955X12445405 (literal)
- Alternative label
A. Scamardella, U. Vietri, L.Sorrentino, M.Lavorgna, E.Amendola (2012)
Foams based on poly(ethylene terephthalate) nanocomposites with enhanced thermal stability
in Journal of cellular plastics (Online)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- A. Scamardella, U. Vietri, L.Sorrentino, M.Lavorgna, E.Amendola (literal)
- Pagina inizio
- Pagina fine
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- Rivista
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto per i Materiali Compositi e Biomedici, CNR, P.le Fermi, 1, 80055 Portici (NA) (literal)
- Titolo
- Foams based on poly(ethylene terephthalate) nanocomposites with enhanced thermal stability (literal)
- Abstract
- Novel poly(ethylene terephthalate) nanocomposites have been developed, incorporating
commercial bottle grade polyester and modified organoclay, which exhibit enhanced
thermal and dynamic-mechanical properties and improved foaming behavior. A benefit
arising from the use of an organoclay is that this class of material is generally able
to withstand the high processing temperatures of engineering polymers, such as
poly(ethylene terephthalate), and not undergo decomposition. This offers a great advantage
over the use of organic modifiers, whose volatile by-products are known to
promote thermal degradation of the polymer matrix under such conditions.
In this work, a novel organoclay was obtained via intercalation of bis-(hydroxyethyl
terephthalate) in sodium montmorillonite layers and then used to prepare poly(ethylene
terephthalate)-clay nanocomposites via melt compounding by using a twin-screw
extruder. Thermogravimetric analysis indicated that the onset decomposition temperatures
of poly(ethylene terephthalate) nanocomposites incorporating this organoclay
were higher than those of controls based on commercial organoclays. However, the
inclusion of this new nanofiller also led to a drastic decrease of melt viscosity, which in
turn suppressed foaming. In order to compensate for the effects of the viscosity reduction,
pyromellitic dianhydride was used in the reactive extrusion process of poly(ethylene
terephthalate) nanocomposites. Rheological analysis showed a strong improvement in
viscosity of these poly(ethylene terephthalate)/pyromellitic dianhydride/organoclay nanocomposites,
to levels of the same order of magnitude as reference commercial foaming (literal)
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- Autore CNR
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