Effect of ZnO nanoparticles on kinetics of thermal degradation and final properties of ethylene–propylene–diene rubber systems

The morphology, thermal degradation behavior in addition to static and dynamic mechanical properties of various ethylene–propylene–diene (EPDM) rubber compounds containing nano-zinc oxide (NZnO) were investigated compared to those of EPDM with ordinary-sized ZnO (OSZnO). The field-emission scanning...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2012-12, Vol.110 (3), p.1407-1414
Main Authors: Kalaee, Mohammadreza, Akhlaghi, Shahin, Mazinani, Saeedeh, Sharif, Alireza, Jarestani, Younes Charesaz, Mortezaei, Mehrzad
Format: Article
Language:English
Subjects:
Analytical Chemistry
Applied sciences
Chemistry
Chemistry and Materials Science
Exact sciences and technology
Inorganic Chemistry
Measurement Science and Instrumentation
Miscellaneous
Physical Chemistry
Physical properties
Polymer industry, paints, wood
Polymer Sciences
Properties and testing
Technology of polymers
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Summary:The morphology, thermal degradation behavior in addition to static and dynamic mechanical properties of various ethylene–propylene–diene (EPDM) rubber compounds containing nano-zinc oxide (NZnO) were investigated compared to those of EPDM with ordinary-sized ZnO (OSZnO). The field-emission scanning electron microscopy studies showed that unlike the conventional system, the formation of large size ZnO agglomerates was discouraged for NZnO filled systems. Thermogravimetric analysis (TG) revealed that the thermal degradation of EPDM system was delayed upon the inclusion of NZnO instead of OSZnO in the compound. The kinetic analysis of TG data based on Friedman and Kissinger methods showed that the nanocomposite samples exhibited higher activation energy ( E a ) and lower order of reaction ( n ) over the conventional system, suggesting the enhancement of thermal stability upon decreasing ZnO particle size. The results obtained from dynamic mechanical analysis and static mechanical characterizations in terms of hardness, resilience, and abrasion tests interestingly indicated that NZnO not merely could act as a thermal insulator, but also could perform as a nano-filler to improve the final performance of EPDM elastomers.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-011-2097-1