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Thermooxidative stability of polymethyl methacrylate containing nanoparticles of silica/titania and silica/zirconia
Šimon, Peter, Zhong, Wei, Bakoš, Dušan and Hynek, David Thermooxidative stability of polymethyl methacrylate containing nanoparticles of silica/titania and silica/zirconia Chemical Papers, Vol.62, No. 2, 2008, 176-180
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Šimon, Peter
Zhong, Wei
Bakoš, Dušan
Hynek, David
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| Title |
Thermooxidative stability of polymethyl methacrylate containing nanoparticles of silica/titania and silica/zirconia
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| Journal name |
Chemical Papers
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| Publication date |
2008
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| Year available |
2008
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| Volume number |
62
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| Issue number |
2
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| ISSN |
0366-6352
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| Start page |
176
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| End page |
180
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2008
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| Language |
english
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| Subject |
250000 Chemical Sciences
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| Abstract/Summary |
The influence of silica/titania and silica/zirconia nanoparticles on thermooxidative degradation of PMMA was studied by non-isothermal thermogravimetry. Kinetic parameters describing the length of the oxidation induction periods were obtained from the treatment of the dependence of oxidation onset temperature on heating rate. Using these parameters, the protection factors of nanoparticles have been calculated. It was found that SiO2/TiO2 nanoparticles increase the thermooxidation stability of PMMA where the stabilizing effect, expressed as the protection factor, depends on temperature only slightly. The stabilizing effect of SiO2/ZrO2 is much stronger than that of SiO2/TiO2 and decreases with increasing temperature.
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