NDLI: Synergistic effect of iron oxide modified carbon nanotubes on the thermal stability of silicone rubber under different atmospheres

Content Provider	Springer Nature Link
Author	Bai, Lu Zheng, Junping
Copyright Year	2015
Abstract	To investigate the synergistic effect and mechanism of γ-Fe$_{2}$O$_{3}$ modified carbon nanotubes (γ-Fe$_{2}$O$_{3}$–CNTs) on the thermal stability of silicone rubber (SR) under different atmospheres, a series of SR-based composites added with α-Fe$_{2}$O$_{3}$, γ-Fe$_{2}$O$_{3}$, CNTs and γ-Fe$_{2}$O$_{3}$–CNTs were prepared and subsequently investigated by Raman spectra, X-ray diffraction, thermogravimetric analysis and tensile testing before and after aging and swelling experiment. The results exhibited that γ-Fe$_{2}$O$_{3}$–CNTs had significant synergistic effect on the thermal stability of SR both under nitrogen and air atmosphere. Under nitrogen atmosphere, the depolymerization of SR was delayed greatly by γ-Fe$_{2}$O$_{3}$–CNTs in the whole temperature range. For example, T $_{50}$ (the temperature at which 50 % degradation occurs) of γ-Fe$_{2}$O$_{3}$–CNTs/SR was 56.9 °C higher than that of neat SR. The synergistic effect is attributed to the nice combination of thermal conductivity of CNTs in the relatively low-temperature range and enhanced interfacial reaction of γ-Fe$_{2}$O$_{3}$ in the relatively high-temperature range. Under air atmosphere, the initial degradation temperature of γ-Fe$_{2}$O$_{3}$–CNTs/SR was greatly improved by about 50 °C. The synergistic effect is mainly proposed to include that CNTs and γ-Fe$_{2}$O$_{3}$ can promote each other to capture the free radicals and thereby terminate the thermo-oxidative degradation process significantly. Owing to the excellent antioxidant ability of γ-Fe$_{2}$O$_{3}$–CNTs, the degradation mechanism of its SR composite is changed completely.
Starting Page	1281
Ending Page	1291
Page Count	11
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	123
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-10-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silicone rubber Carbon nanotubes Iron oxide Thermal stability Synergistic effect Degradation atmosphere Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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