Yazar "Ozdemir, Eyuep" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    SYNTHESIS, CHARACTERIZATION AND THERMAL DEGRADATION OF OLIGO-2-[(4-IODOPHENYLIMINO)METHYL]PHENOL AND OLIGOMER-METAL COMPLEXES
    (Chem Soc Ethiopia, 2009) Kaya, İsmet; Moral, Fatma; Ozdemir, Eyuep
    The conditions for oxidative condensation of 2-[(4-iodophenylimino)methyl]phenol (IPIMP) were studied with air and NaOCI as oxidants in an aqueous alkaline medium between 50 and 90 degrees C. Size exclusion chromatography (SEC) showed that the number-average molecular weight (M(n)), weight-average molecular weight (M(w)) and polydispersity index (PDI) values, respectively, were 1250, 1300 g mol(-1) and 1.040 for oxidation with NaOCI and 2200, 2500 g mol(-1) and 1.136 for oxidation by air. With the optimum reaction conditions, the yield of OIPIMP was found to be 67 % with NaOCI, and 29 % with air, as oxidant. The OIPIMP was characterized by (1)H-NMR, (13)C-NMR, FT-IR, UV-Vis and elemental analysis. Metal complexes of the oligomer were shown to be more thermally stable than OIPIMP itself.
  • [ X ]
    Öğe
    Synthesis, characterization, and kinetic study of functional polystyrenes
    (John Wiley & Sons Inc, 2007) Doğan, Fatih; Kaya, İsmet; Dayan, Osman; Ozdemir, Eyuep
    In this study, functionalization of polystyrene (PS) (M,, = 2.5 X 105) was carry out with maleic anhydride in the presence of boron trifluoride dietyhletherade (BF3 OEt2) as catalyst and then functional PS was subjected to condensation reaction with phenyl hydrazine. The structures of both of them were determined by using FTIR, H-1-NMR, elemental analysis, thermogravimetric analysis (TGA) and differential thermal analysis (DTA) techniques. Some physical properties of these two products were investigated and the kinetic parameters of solid state decomposition reactions were determined from TGA curves. The intrinsic viscosity [eta] values of modified PS and condensation products (cPs) found to be 1.024 and 0.7036 dL g(-1) respectively. According to TGA, the weight losses of modified PS and cPs were found to be 84.03 and 81.86%, respectively, at 500 degrees C. (c) 2007 Wiley Periodicals, Inc.