Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding
Zirconia nanoparticles were synthesized by means of a sol-gel method and embedded in poly(methyl methacrylate) (PMMA) by melt compounding. The zirconia was well dispersed in the PMMA matrix, with only a few clusters, especially for the highest investigated zirconia content. NMR results showed hetero...
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Budapest University of Technology
2012-11-01
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doaj-95cfb1ce5f9b40359ce3629eeb5d0d3b2020-11-24T22:56:04ZengBudapest University of Technology eXPRESS Polymer Letters1788-618X2012-11-0161187188110.3144/expresspolymlett.2012.93Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compoundingA. S. LuytT. E. MotaungM. L. SaladinoD. C. MartinoE. CaponettiZirconia nanoparticles were synthesized by means of a sol-gel method and embedded in poly(methyl methacrylate) (PMMA) by melt compounding. The zirconia was well dispersed in the PMMA matrix, with only a few clusters, especially for the highest investigated zirconia content. NMR results showed heteronuclear dipolar interactions involving the carbons and the surrounding hydrogen nuclei. The effect of the amount of zirconia, in the range of 1–5!wt%, on the thermomechanical properties and thermal degradation kinetics of PMMA was also investigated by means of dynamic mechanical analysis (DMA), thermogravimetric analyses (TGA), and Fourier-transform infrared spectroscopy (FTIR). The presence of zirconia showed a decrease in the storage and loss moduli at lower temperatures, probably due to a plasticization effect. The presence of zirconia in PMMA slightly increased its thermal stability, but the activation energies of thermal degradation for the nanocomposites were significantly lower, at degrees of conversion higher than 0.3, than those of pure PMMA.http://www.expresspolymlett.com/letolt.php?file=EPL-0003556&mi=cdNanocompositesPMMAZirconiaMorphologyThermal degradation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. S. Luyt T. E. Motaung M. L. Saladino D. C. Martino E. Caponetti |
spellingShingle |
A. S. Luyt T. E. Motaung M. L. Saladino D. C. Martino E. Caponetti Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding eXPRESS Polymer Letters Nanocomposites PMMA Zirconia Morphology Thermal degradation |
author_facet |
A. S. Luyt T. E. Motaung M. L. Saladino D. C. Martino E. Caponetti |
author_sort |
A. S. Luyt |
title |
Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding |
title_short |
Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding |
title_full |
Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding |
title_fullStr |
Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding |
title_full_unstemmed |
Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding |
title_sort |
morphology, mechanical properties and thermal degradation kinetics of pmma-zirconia nanocomposites prepared by melt compounding |
publisher |
Budapest University of Technology |
series |
eXPRESS Polymer Letters |
issn |
1788-618X |
publishDate |
2012-11-01 |
description |
Zirconia nanoparticles were synthesized by means of a sol-gel method and embedded in poly(methyl methacrylate) (PMMA) by melt compounding. The zirconia was well dispersed in the PMMA matrix, with only a few clusters, especially for the highest investigated zirconia content. NMR results showed heteronuclear dipolar interactions involving the carbons and the surrounding hydrogen nuclei. The effect of the amount of zirconia, in the range of 1–5!wt%, on the thermomechanical properties and thermal degradation kinetics of PMMA was also investigated by means of dynamic mechanical analysis (DMA), thermogravimetric analyses (TGA), and Fourier-transform infrared spectroscopy (FTIR). The presence of zirconia showed a decrease in the storage and loss moduli at lower temperatures, probably due to a plasticization effect. The presence of zirconia in PMMA slightly increased its thermal stability, but the activation energies of thermal degradation for the nanocomposites were significantly lower, at degrees of conversion higher than 0.3, than those of pure PMMA. |
topic |
Nanocomposites PMMA Zirconia Morphology Thermal degradation |
url |
http://www.expresspolymlett.com/letolt.php?file=EPL-0003556&mi=cd |
work_keys_str_mv |
AT asluyt morphologymechanicalpropertiesandthermaldegradationkineticsofpmmazirconiananocompositespreparedbymeltcompounding AT temotaung morphologymechanicalpropertiesandthermaldegradationkineticsofpmmazirconiananocompositespreparedbymeltcompounding AT mlsaladino morphologymechanicalpropertiesandthermaldegradationkineticsofpmmazirconiananocompositespreparedbymeltcompounding AT dcmartino morphologymechanicalpropertiesandthermaldegradationkineticsofpmmazirconiananocompositespreparedbymeltcompounding AT ecaponetti morphologymechanicalpropertiesandthermaldegradationkineticsofpmmazirconiananocompositespreparedbymeltcompounding |
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