Influence of the Type of Epoxy Resin and Concentration of Glycidylisobutyl-POSS in the Properties of Nanocomposites
| Autor: | Marielen Longhi, Sandra Raquel Kunst, Lucas Pandolphi Zini, Ademir J. Zattera |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Nanocomposite
Materials science Polymers and Plastics 02 engineering and technology Epoxy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Composite material 0210 nano-technology |
| Zdroj: | Polymers and Polymer Composites. 25:593-602 |
| ISSN: | 1478-2391 0967-3911 |
| DOI: | 10.1177/096739111702500804 |
| Popis: | Epoxy resin is one of the most used resins for obtaining composites and coatings. Its properties have been modified using many materials, mainly based on nanotechnology, such as clays and polyhedral oligomeric silsesquioxanes (POSS). POSS may increase thermal and mechanical resistance and hydrophobicity of the epoxy resin. This study aims at characterizing epoxy nanocomposites, using two distinct resins (DGEBA and DGEBF) and an addition of glycidylisobutyl-POSS in contents of 2.5% and 5% (w/w), through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Samples showed an amorphous halo due to the epoxy resin and a characteristic peak of POSS. TGA results showed a greater residual mass in DGEBF systems due to its wider formation of crosslinks. FTIR spectra demonstrated a higher amplitude of the hydroxyl band in DGEBF 5% system, which may affect its hydrophilic behavior because of the molecular mobility and resin weight reduction. DMA results showed that DGEBA systems are more flexible than DGEBF. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|