The effect of silica nanoparticles on the morphology, mechanical properties
and thermal degradation kinetics of polycarbonate

M. o. t. a. u. n. g., Te; Saladino, Ml; L. u. y. t., As; Chillura Martino, Df

doi:http://dx.doi.org/10.1016/j.compscitech.2012.08.014

Archivio istituzionale della ricerca dell'Università degli Studi di Palermo

IRIS è il sistema di gestione integrata dei dati della ricerca (persone, pubblicazioni, progetti, attività) adottato dall’Università di Palermo, e ha lo scopo di raccogliere, conservare, documentare, e diffondere ad accesso aperto le informazioni relative alla produzione scientifica degli autori afferenti all’Ateneo.

Polycarbonate/silica nanocomposites with different silica quantities were prepared by a melt compounding method. The effect of silica amount, in the range 1–5 wt.%, on the morphology, mechanical properties and thermal degradation kinetics of polycarbonate (PC) was investigated. Clusters of silica nanoparticles were well dispersed in the polycarbonate whose structure remained amorphous. NMR results showed intermolecular interactions involving the carbonyl groups of different polymeric chains which did not affect the intramolecular rotational motions. The presence of the lowest silica content showed a decrease in the storage and loss moduli below the glass transition temperature, probably due to a plasticization effect. However, an increase in the amount of silica increased the moduli. The presence of silica in PC slightly increased the thermal stability, except for the highest silica content which showed a decrease. The activation energies of thermal degradation for the nanocomposites depended on the amount of silica and on the degree of conversion.

Data di pubblicazione:	2012
Titolo:	The effect of silica nanoparticles on the morphology, mechanical properties and thermal degradation kinetics of polycarbonate
Autori:	M.o.t.a.u.n.g.,.T. E. SALADINO, Maria Luisa L.u.y.t.,.A. S. CHILLURA MARTINO, Delia Francesca mostra contributor esterni nascondi contributor esterni
Citazione:	M. o. t. a. u. n. g., ., Saladino, M., L. u. y. t., ., & CHILLURA MARTINO, D. (2012). The effect of silica nanoparticles on the morphology, mechanical properties and thermal degradation kinetics of polycarbonate. COMPOSITES SCIENCE AND TECHNOLOGY, 73, 34-39.
Rivista:	COMPOSITES SCIENCE AND TECHNOLOGY
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.compscitech.2012.08.014
Abstract:	Polycarbonate/silica nanocomposites with different silica quantities were prepared by a melt compounding method. The effect of silica amount, in the range 1–5 wt.%, on the morphology, mechanical properties and thermal degradation kinetics of polycarbonate (PC) was investigated. Clusters of silica nanoparticles were well dispersed in the polycarbonate whose structure remained amorphous. NMR results showed intermolecular interactions involving the carbonyl groups of different polymeric chains which did not affect the intramolecular rotational motions. The presence of the lowest silica content showed a decrease in the storage and loss moduli below the glass transition temperature, probably due to a plasticization effect. However, an increase in the amount of silica increased the moduli. The presence of silica in PC slightly increased the thermal stability, except for the highest silica content which showed a decrease. The activation energies of thermal degradation for the nanocomposites depended on the amount of silica and on the degree of conversion.
Settore Scientifico Disciplinare:	Settore CHIM/02 - Chimica Fisica
Appare nelle tipologie:	1.01 Articolo in rivista

File in questo prodotto:

File	Descrizione	Tipologia	Licenza
44_SiO2_PC.pdf		N/A		Open Access Visualizza/Apri

Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/10447/74691

Citazioni

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.