Preparation, characterization, and properties of polystyrene/Na-montmorillonite composites
| Autor: | Pınar Acar Bozkurt, Fatma Eroğlu, Sibel Erol Dağ, Meltem Çelik |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
In situ
Materials science Composite number Radical polymerization 02 engineering and technology Benzoyl peroxide 021001 nanoscience & nanotechnology Condensed Matter Physics Characterization (materials science) chemistry.chemical_compound 020303 mechanical engineering & transports Montmorillonite 0203 mechanical engineering chemistry mental disorders Ceramics and Composites medicine Polystyrene Composite material In situ polymerization 0210 nano-technology medicine.drug |
| Zdroj: | Journal of Thermoplastic Composite Materials. 32:1078-1091 |
| ISSN: | 1530-7980 0892-7057 |
| DOI: | 10.1177/0892705718785691 |
| Popis: | A series of polystyrene (PS)/unmodified Na-montmorillonite (Na-MMT) composites were prepared via in situ radical polymerization. The prepared composites were characterized using various techniques. The presence of various functional groups in the unmodified Na-MMT and PS/unmodified Na-MMT composite was confirmed by Fourier transform infrared spectroscopy. Morphology and particle size of prepared composites was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). According to the XRD and TEM results, the interlayer spacing of MMT layers was expanded. SEM images showed a spongy and porous-shaped morphology of composites. TEM revealed the Na-MMT intercalated in PS matrix. The thermal stability of PS/unmodified Na-MMT composites was significantly improved as compared to PS, which is confirmed using thermogravimetric analysis (TGA). The TGA curves indicated that the decomposition temperature of composites is higher at 24–51°C depending on the composition of the mixture than that of pure PS. The differential scanning calorimetry (DSC) results showed that the glass transition temperature of composites was higher as compared to PS. The moisture retention, water uptake, Brunauer–Emmett–Teller specific surface area, and specific pore volume of composites were also investigated. Water resistance of the composites can be greatly improved. |
| Databáze: | OpenAIRE |
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