Gültek, AhmetSeçkin, TurgayAdıgüzel, Halil İbrahim2020-07-012020-07-012005Ahmet G., TURGAY S., HALİL İBRAHİM A. (2005). Design and characterization of amino and chloro functionalized rhombohedral silsesquioxanes, Turkish Journal of Chemistry, İnönü Üniversitesi, Malatya.1300-05271303-6130https://hdl.handle.net/11616/16280https://search.trdizin.gov.tr/yayin/detay/48991Öz: Başlık (İngilizce): Öz (İngilizce): A more rapid and a versatile synthetic approach for the preparation of polyhedral silsesquioxanes (POSS) by hydrolytic condensation of organosilicon monomers in the presence of a Pt catalyst was studied. The structural properties of POSS molecules were determined by X-ray powder diffraction analysis, yielding a rhombohedral unit cell with a = 11,52796A and a = 94,9754° for octaaminopropyl-POSS, and a rhombohedral unit cell with a = 11,51421A, a = 96,7214° for octachloropropyl-POSS. The activation energies were found to be 64.8, and 89.1 kJ/mol for octaaminopropyl-POSS and octachloropropyl-POSS, respectively. The products were also characterized by Fourier transform infrared spectroscopy, 1H and 13C nuclear magnetic resonance, differential thermal analysis, and thermogravimetric analysistrinfo:eu-repo/semantics/openAccessMühendislikKimyaArticle29439139948991WOS:000231602700007Q2