Thermal Behaviour of a Series of Novel Aliphatic Bridged Polyhedral Oligomeric Silsesquioxanes (POSSs)/ Polystyrene (PS) Nanocomposites: the Influence of the Bridge Length on the Resistance to Thermal Degradation
| Autor: | Paola Bottino, Lorenzo Abate, Francesco A. Bottino, Ignazio Blanco |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
thermogravimetric analysis
Thermogravimetric analysis Nanocomposite Materials science Polymers and Plastics resistance to the thermal degradation Condensed Matter Physics Styrene Nanocomposites bridged POSSs chemistry.chemical_compound Differential scanning calorimetry chemistry Chemical engineering Mechanics of Materials Polymer chemistry Polystyrene Materials Chemistry Proton NMR In situ polymerization Glass transition |
| Popis: | The thermal degradation of Polystyrene based nanocomposites, containing as fillers novel dumbbell-shaped bridged POSSs in which two identical silicon cages R 7 (SiO 1.5 ) 8 (R = isobutyl), are linked to aliphatic bridges (CH 2 ) n of different lengths ( n = 2, 4, 6, 8 and 10), was studied. Various nanocomposites were prepared by in situ polymerization of styrene in the presence of 5% of appropriate POSS. The obtained compounds were characterized by 1 H NMR spectroscopy, to verify their actual filler content, which was slightly higher than that in starting mixtures, and by Differential Scanning Calorimetry (DSC) to determine glass transition temperature ( T g ). Thermogravimetric (TG) and Differential Thermogravimetric (DTG) analysis, in both flowing nitrogen and static air atmosphere, were carried out and temperatures at 5% mass loss ( T 5% ) were determined to investigate the resistance to the thermal degradation. The results obtained for various samples were compared with each other and with those of virgin Polystyrene, and were interpreted and discussed. |
| Databáze: | OpenAIRE |
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