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TEMEL, BİNNUR

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BİNNUR
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TEMEL
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Author: Aydogan, BİNNUR × Author: Ates, Sahin ×

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    Synthesis, characterization and thermally activated curing of polysulfones with benzoxazine end groups
    (2011-03-23T00:00:00Z) Ates, Sahin; Dizman, Cemil; Aydogan, BİNNUR; KISKAN, Bans; TORUN, Lokman; Yağcı, Yusuf; TEMEL, BİNNUR
    Polysulfones with benzoxazine end groups (PSU-B-a) were obtained using monomer synthesis method from the phenol terminated polysulfone (PSU-OH), aniline and paraformaldehyde as starting materials. For this purpose, the precursor PSU-OHs with different molecular weights were prepared by condensation of bisphenol-A and bis(p-chlorophenyl) sulfone in presence of potassium carbonate. The structure of the polymers before and after functionalization was confirmed by proton nuclear magnetic resonance spectroscopy (H-1 NMR) and Fourier transform infrared spectroscopy (FT-IR). Thermally activated crosslinking behavior of these polymers was investigated by differential scanning calorimetry (DSC). Thermal and tensile properties of the crosslinked polymers obtained from PSU-B-a alone or with low molar mass benzoxazine (P-a) were studied by thermal gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). (C) 2011 Elsevier Ltd. All rights reserved.
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    Synthesis and characterization of triptycene type cross-linker and its use in photoinduced curing applications
    (2010-02-15T00:00:00Z) Ates, Sahin; Aydogan, BİNNUR; TORUN, Lokman; Yağcı, Yusuf; TEMEL, BİNNUR
    A novel triptycene type diacrylate cross-linker, triptycene hydroquinone diacrylate (THDA) was synthesized from the reaction of triptycene hydroquinone with acryloyl chloride and characterized. The photocuring behaviour and the reaction kinetics of the synthesized cross-linker were investigated by means of photo-differential scanning calorimetry (photo-DSC) experiments. Formulations containing monofunctional (meth)acrylate monomers, namely glycidyl methacrylate (GMA), 2-hydroxyethyl acrylate (HEA), 2-hydroxyethyl methacrylate (HEMA), and 2-ethylhexyl methacrylate (EHMA), crosslinker, THDA and 2,2-dimethoxy-2-phenylacetophenone (DMPA) as a photoinitiator were irradiated. A conventional cross-linker without triptycene unit Such as hydroquinone diacrylate (HDA) was used under the same conditions for comparison. The effects of the Structure of the monofunctional monomer and triptycene moiety on the photopolymerization kinetics were evaluated and discussed. (C) 2010 Elsevier Ltd. All rights reserved.
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    Intramolecular Cross-linking of Polymers Using Difunctional Acetylenes via Click Chemistry
    (2011-01-01T00:00:00Z) Cengiz, Halime; Aydogan, BİNNUR; Ates, Sahin; Acikalin, Engin; Yağcı, Yusuf; TEMEL, BİNNUR
    An efficient approach was described for the intramolecular cross-linking of azide-functionalized poly(styrene-co-chloromethyl styrene) co-polymers (PS-N-3) via click chemistry at room temperature. Reaction of PS-N-3 with the appropriate diacetylene functional compounds such as 1,4-diethynylbenzene (DEB) and 1,10-dipropargyloxy decane (DPD) in ultra-dilute solutions led to unimolecular particle-like structures. The resulting polymers were characterized in detail by H-1-NMR, FT-IR, GPC and DSC measurements. (C) Koninklijke Brill NV, Leiden, 2011