Microwave-assisted simultaneous novel synthesis of poly(dibromophenylene oxide)s, poly(diiodophenylene oxide)s (p), conducting(cp) and/or crosslinked (clp) and/or radical ion polymers (rip)

Çelik, Güler Bayraklı
Microwave-assisted novel synthesis of poly(dibromophenylene oxide) or poly(diiodophenylene oxide) (P), conducting polymer (CP) and/or crosslinked polymer (CLP) and/or radical ion polymer (RIP) were achieved simultaneously from lithium, sodium or potassium 2,4,6-bromophenolate or sodium 2,4,6-iodophenolate in a very short time interval. Polymerizations were carried out by constant microwave energy with different time intervals varying from 1 to 20 min; or at constant time intervals with variation of microwave energy from 70 to 900 watt; or varying the water content from 0.5 to 5 ml at constant time intervals and microwave energy. Poly(dihalophenylene oxide) and radical ion polymers were characterized by FTIR (Fourier Transform Infrared), 1H-NMR (Proton Nuclear Magnetic Resonance), 13C-NMR (Carbon-13 Nuclear Magnetic Resonance), TGA/ FTIR (Thermal Gravimetric Analysis / Fourier Transform Infrared), DSC (Differential Scanning Calorimeter), SEM (Scanning Electron Microscope), ESR (Electron Spin Resonance), GPC (Gel Permeation Chromatography), UV-Vis (UV-Visible Spectroscopy), Light Scattering and Elemental Analysis. Conducting and crosslinked polymers were characterized by FTIR, TGA/ FTIR, DSC, SEM, ESR, XRD (Powder Diffraction X-Ray) and Elemental Analysis. The effects of heating time, microwave energy and water content on the percent conversion and the polymer synthesis were also investigated.


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Öztürk, Tuğba; Küçükyavuz, Zuhal; Department of Chemistry (2005)
P-xylene-bis(diethylsulphonium chloride) (PXBDC) monomer was synthesized by the reaction of a,a-dichloro-p-xylene with tetrahydrothiophene or diethyl sulphide. Electrochemical behavior of this monomer (PXBDC) was examined by cyclic voltametry. Polymerization was achieved both by using electrochemical and chemical polymerization techniques. In the electrochemical technique, PPV was synthesized by constant potential electrolysis in acetonitrile-tetrabutylammonium tetrafluoroborate (TBAFB) solvent-electrolyte ...
Biosensor based on interpenetrated polymer network of alginic acid and poly(1-vinylimidazole )
Kartal, Müjgan; Toppare, Levent Kamil; Department of Chemistry (2008)
A new proton conductor polymer was prepared using alginic acid (AA) and poly (1-vinylimidazole) (PVI). The polymer network was obtained by mixing AA and PVI at various stoichiometric ratios, x (molar ratio of the monomer repeat units). The AA/PVI network was characterized by elemental analysis (EA) and FT-IR spectroscopy. Potential use of this network in enzyme immobilization was studied. Enzyme entrapped polymer networks (EEPN) were produced by immobilizing invertase and tyrosinase (PPO) in the AA/PVI netw...
Polyaniline: synthesis characterization solution properties and composites
Yılmaz, Faris; Küçükyavuz, Zuhal; Department of Polymer Science and Technology (2007)
Polyaniline was chemically synthesized at three different temperatures of 25, 0, and -25oC, by oxidative polymerization with ammonium peroxidisulfate at equimolar of aniline to oxidant ratio and 1M HCl. The resulted polyaniline was in a powder form which was characterized by several techniques such as: electrical conductivity, elemental analysis, thermal analysis, wide-angle X-Ray diffraction, and scanning electron microscope. The solution properties of the reduced polymer were studied by viscometry, static...
Copolymerization of carbon disulfide, carbon dioxide and other carbonic acid derivatives with cyclic ethers by using metal xanthate catalysts
Öztürk, Elif; Alyürük, Kemal; Department of Polymer Science and Technology (2006)
The synthesis of high molecular weight copolymer of carbon disulphide (CS2) and propylene oxide (PO) has not reported in literature. In the present work, zinc isopropyl xanthate (Zn(Xt)2) was used as catalyst for the copolymerisation of PO and CS2 into high copolymer. However, the product can be fractionated into high and low molecular weight components. High molecular weight copolymer was rubbery products, but low molecular weight copolymers were oily products containing cyclic dithiocarbonates. Copolymers...
Synthesis of polythiophene and polypyrrole derivatives and their application in electrochromic devices
Ak, Metin; Toppare, Levent Kamil; Department of Chemistry (2006)
Different substituted thiophene and pyrrole monomers namely hexamethylene (bis-3-thiopheneacetamide) (HMTA), N-(4-(3-thienylmethylene)-oxycarbonylphenyl)maleimide (MBThi), 2,4,6-Tris-(4-pyrrol-1-yl-phenoxy)-[1,3,5]triazine (TriaPy), 2,4,6-Tris-(thiophen-3-ylmethoxy)-[1,3,5] triazine (TriaTh), and N-(2-(thiophen-3-yl)methylcarbonyloxyethyl) maleimide (NMT) were synthesized. The chemical structures of the monomers were characterized by Nuclear Magnetic Resonance (1H-NMR and 13C-NMR) and Fourier Transform Infr...
Citation Formats
G. B. Çelik, “Microwave-assisted simultaneous novel synthesis of poly(dibromophenylene oxide)s, poly(diiodophenylene oxide)s (p), conducting(cp) and/or crosslinked (clp) and/or radical ion polymers (rip),” Ph.D. - Doctoral Program, Middle East Technical University, 2007.