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Effects of chemical structure and chain end groups on the thermal stability of new silsesquioxanes with methacrylate and/or vinyl units

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Bogdan C. Simionescu, Irina-Elena Bordianu, Nita Tudorachi, Corneliu Cotofana, Laura Ursu, Adina Coroaba, Mioara Drobota, Mihaela Olaru

Editorial: Materials Chemistry and Physics, p.1-15, 2013.

Rezumat:

The paper reports the synthesis of new silsesquioxanes with methacrylate and/or vinyl units, obtained by combining the solegel technique with radical polymerization in the presence of 2,20-azobis(2-methylpropionitrile) as initiator and a cationic surfactant, cetyltrimethylammonium bromide. The thermal behaviour was investigated through simultaneous thermogravimetric and differential scanning calorimetry analysis (TG/DSC) coupled on-line with Fourier transform infrared spectroscopy (FTIR) and mass spectrometry (MS), as well as by pyrolysis and gas chromatographyemass spectrometry (GCeMS). The aim of the investigation consists in drawing useful information on the influence of both chemical structure and chain end double bonds and silanol units on the resistance of such compounds against thermal degradation.

Cuvinte cheie: Nanostructures, Heat treatment,Thermal properties, Polymers

URL: http://dx.doi.org/10.1016/ j.matchemphys.2013.02.022