Effect of polyhedral oligomeric silsesquioxane nanoreinforcement on the properties of epoxy resin/monoglycidylether-terminated poly(dimethylsiloxane) nanocomposites
| Autor: | Nicoleta M. Florea, Adriana Lungu, Celina Maria Damian, Cristina Ionescu, Liviu Craciun, Petre Badica, Monica Enculescu, Gratiela Teodora Tihan, Brindusa Balanuca, Horia Iovu |
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| Rok vydání: | 2016 |
| Předmět: |
Nanocomposite
Morphology (linguistics) Materials science Polymers and Plastics Organic Chemistry 02 engineering and technology Epoxy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Silsesquioxane 0104 chemical sciences Characterization (materials science) chemistry.chemical_compound chemistry visual_art Materials Chemistry visual_art.visual_art_medium Composite material 0210 nano-technology |
| Zdroj: | High Performance Polymers. 28:724-734 |
| ISSN: | 1361-6412 0954-0083 |
| Popis: | This article reports the synthesis and characterization of several types of organic–inorganic nanocomposites based on epoxy resin/monoglycidylether-terminated poly(dimethylsiloxane) reinforced with 2, 5, or 10 wt% polyhedral oligomeric silsesquioxanes (POSS) bearing one glycidyl (1GE-POSS) or eight glycidyl(8GE-POSS) groups. The morphological features of the studied samples were established through atomic force microscopy, contact angle measurements, X-ray photoelectron spectroscopy, and scanning electron microscopy/energy-dispersive X-ray spectroscopy, and it was demonstrated that 8GE-POSS is well dispersed within the polymer matrix, while 1GE-POSS exhibits a high tendency to form aggregates. Differential scanning calorimetry (DSC) and Fourier transform infrared resonance (FTIR) measurements are used to follow the curing behavior and to study the polymerization kinetics of epoxy groups. As evidenced by DSC and FTIR results, the inclusion of 8GE-POSS within the polymer matrix leads to a lower epoxy polymerization rate of the resulted nanocomposites than those reinforced with 1GE-POSS. The dynamic mechanical analysis results revealed that the thermomechanical properties are gradually improved with increasing of 8GE-POSS content due to the higher cross-linking density. |
| Databáze: | OpenAIRE |
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