Thermal properties and non-isothermal curing kinetics of carbon nanotubes/ionic liquid/epoxy resin systems
| Autor: | Xiangyun Zheng, Chen Xiaoting, Feng Chuanyi, Li Daoke |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Diglycidyl ether
Materials science Order of reaction Epoxy Carbon nanotube Condensed Matter Physics law.invention Reaction rate chemistry.chemical_compound chemistry law visual_art Ionic liquid visual_art.visual_art_medium Thermal stability Physical and Theoretical Chemistry Composite material Instrumentation Curing (chemistry) |
| Zdroj: | Thermochimica Acta. 618:18-25 |
| ISSN: | 0040-6031 |
| Popis: | Nanocomposites of multi-wall carbon nanotubes in diglycidyl ether of a bisphenol A epoxy matrix were prepared using ionic liquid [BMIM]PF 6 as a dispersion agent and diaminodiphenyl methane as a hardener. The non-isothermal curing kinetics of the neat EP, CNTs/EP and CNTs/ILs/EP were investigated, and the activation energy was calculated using the Kissinger equation. Two-parameter autocatalytic equations of Sestak–Berggren model were constructed to describe the curing reaction rate quantitatively. The reaction orders, pre-exponential factor A and kinetic model f ( α ) were determined by curve fitting, and the calculated curves described the observed reaction rate well. TGA and DMA were used to measure the thermal properties of the composites. Adding ILs increased the storage modulus of composites, but decreased the thermal stability. Fracture surfaces of CNTs/EP and CNTs/ILs/EP composites were observed by SEM. CNTs showed better dispersion state in CNTs/ILs/EP composites. |
| Databáze: | OpenAIRE |
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