TY  - JOUR
TI  - Design and characterization of amino and chloro functionalized rhombohedral silsesquioxanes
AB  - 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 $^{13}C$ nuclear magnetic resonance, differential thermal analysis, and thermogravimetric analysis
AU  - GÜLTEK, Ahmet
AU  - SEÇKİN, Turgay
AU  - ADIGÜZEL, HALİL İBRAHİM
PY  - 2005
JO  - Turkish Journal of Chemistry
VL  - 29
IS  - 4
SN  - 1300-0527
SP  - 391
EP  - 399
DB  - TRDizin
UR  - http://search/yayin/detay/48991
ER  -