This work deals with the study of the influence of metallocene type polypropylene (mPP) molecular weight on isothermal crystallization of its nanocomposites filled with hydrophobic and hydrophilic nanosilica (1 and 2 vol.%). Real amount of nanosilica was determined by thermogravimetry. Isothermal crystallization was performed on differential scanning calorimeter (DSC) at 119–125 °C and observed in-situ under optical polarizing microscope (POM) at 128 °C using hot stage. The increase of mPP crystallinity degree in time was determined on DSC and spherulite type and growth rate was determined using POM. Supramolecular surface structure of the original and isothermally crystallited nanocomposites was observed directly or after chemical etching (mixture of mineral acids with KMnO4) on confocal laser scanning microscope. The crystal structure of mPP was in all tested materials verified by X-ray diffraction.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:216883 |
| Creators | Krajčik, Ladislav |
| Contributors | Poláček, Petr, Bálková, Radka |
| Publisher | Vysoké učení technické v Brně. Fakulta chemická |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
Page generated in 0.003 seconds