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Flame retardance and thermal stability of carbon nanotube epoxy composite prepared from sol-gel method |
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| Authors: | Chen-Feng Kuan Yi-Luen Li Hsu-Chiang Kuan |
| Affiliation: | a Department of Computer Application Engineering, Far East University, Tainan 744, Taiwan b Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan c Department of Material Science and Engineering, Far East University, Tainan 744, Taiwan d Department of Safety, Health and Environmental Engineering, Hung-Kuang University, Taichung 433, Taiwan |
| Abstract: | Carbon nanotubes (CNTs) are functionalized by vinyltriethoxysilane (VTES) to incorporate the -O-C2H5 functional group and become VTES—CNT. The VTES—CNTs are added to the modified DGEBA epoxy resin that contains silicon to induce the sol-gel reaction. The final products are organic/inorganic nanocomposites. Thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) are used to study the thermal property of nanocomposites. The Tg was increased from 118 to 160 °C and char yield of composites that contained 9 wt% CNT at 750 °C was increased by 46.94%. The integral procedural decomposition temperature (IPDT) was increased from 890 to 1571 °C. The limiting oxygen index (LOI) and UL-94 tests were classified as the flame retardance. The LOI of composites was increased from 22 to 27 and the UL-94 changed from V-1 to V-0 when the contents were increased to 9 wt%. The nanocomposites had a higher char yield and were highly flame retardant. The products can meet to the requirements of halogen-free and phosphorus-free ecological flame retardant. |
| Keywords: | A. Polymers B. Sol-gel growth C. Thermogravimetric analysis (TGA) |
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