Browsing by Author "Bayram, I"

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    Synthesis of Poly(cyclohexene oxide)-Montmorillonite Nanocomposite via In Situ Photoinitiated Cationic Polymerization with Bifunctional Clay
    Bayram, I; Oral, A; Sirin, K
    Poly(cyclohexene oxide) (PCHO)/clay nanocomposites were prepared by means of in situ photoinitiated cationic polymerization with initiator moieties immobilized within the silicate galleries of the clay particles. Diphenyliodonium molecules were intercalated via cation exchange process between Cloisite Ca and diphenyliodonium. The polymerization of CHO through the interlayer galleries of the clay can provide a homogenous distribution of the clay layers in the polymer matrix in nanosize and results in the formation of PCHO/clay nanocomposites. The rates of clay loadings were changed to 1%, 3%, and 5% so as to investigate the effect of clay and initiator amount on polymer. X-ray diffraction (XRD) spectroscopy, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) methods were used for the characterization of modified clay and nanocomposite materials. Thermal stability of PCHO/MMT nanocomposites was also studied by both differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).
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    Pediatric inverted papilloma of the middle ear: Case report and review of the literature
    Ulkumen, B; Kaplan, Y; Kiroglu, AF; Bayram, I
    Inverted papilloma of middle ear is a very rare clinical entity. It has been reported only in the adult population. We report a middle ear inverted papilloma in an 11-year-old male. To the best of our knowledge it is the first pediatric inverted papilloma of middle ear. The patient had a history of chronic suppurative otitis media and the lesion was found during preoperative evaluation for a tympanoplasty procedure. Total excision of the lesion and a tympanoplasty operation was accomplished. We reviewed the middle ear inverted papilloma cases regarding the age distribution, pathophysiology, treatment and prognosis. (C) 2014 Elsevier Ireland Ltd. All rights reserved.