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EnglishPolycarbonate/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.
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.
| Data di pubblicazione: | 2012 |
| Titolo: | The effect of silica nanoparticles on the morphology, mechanical properties and thermal degradation kinetics of polycarbonate |
| Autori: | |
| 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: | |
| 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 |
http://hdl.handle.net/10447/74691
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