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    Development and characterization of lithium salts doped nanoconductive ROMP polymers
    (Elsevier Science Sa, 2010) Çetinkaya, Sevil
    The work presented in this paper describes a new technique for the design and synthesis of nanoconductive polymers. These nanoconductive materials were based on the ROMP of norbornene monomers with oxygen in the 7-position using Grubbs ruthenium initiator, Ru(=CHPh)(PCy(3))(2)Cl(2), and mixing the resulting polymer with various inorganic salts such as LiBF(4), LiPF(6). LiA(5)F(6) and LiSbF(6). The norbornene derivative monomers and the corresponding ROMP polymers were fully characterized by spectral methods. The ROMP polymers containing inorganic salts were investigated by ESEM (environmental scanning electron microscopy) for the formation of nano-structures. The distribution of the lithium salts within the polymer matrix was determined by IBA analysis. The conductivity measurements were carried out on thin films of the ROMP polymers containing inorganic salts. (C) 2010 Elsevier B.V. All rights reserved.
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    Homogeneous catalysis in the preparation of new carboximide-based thermoplastic polymers
    (Elsevier Science Bv, 2010) Çetinkaya, Sevil; Özker, Taner
    The ring opening metathesis polymerization (ROMP) of norbornene dicarboximide derivatives 3(a-c) bearing halo-substituted phenyl groups was carried out with well-defined organometallic catalyst (PCy(3))(2)(Cl)(2)Ru=CHPh. This catalyst is highly active for the polymerization of norbornene dicarboximide derivatives. Exo-N-4-chlorophenyl-norbornene-5,6-dicarboximide (ClPhNDI, 3a), exo-N-4-bromophenyl-norbornene-5,6-dicarboximide (BrPhNDI, 3b), exo-N-4-iodophenyl-norbornene-5,6-dicarboximide (IPhNDI, 3c) monomers gave high molecular weight thermoplastic polymers in high yields (77-96%). All of the prepared polymers were soluble in common organic solvents at room temperature and gave similar IR and NMR spectra. Their glass transition temperatures were detected at temperatures over 187 degrees C. The surface properties of ROMP polymers were investigated by SEM. (C) 2010 Elsevier B.V. All rights reserved.
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    Nanoiletken romp polimerlerinin sentezi ve karakterizasyonu
    (2008) Çetinkaya, Sevil
    Bu projede çeşitli lityum tuzları (LİBF, LİBF, LİAsF, LİSBF) içeren ROMP POLİMERLERİNE DAYALI NANOİLETKEN romp polimer elektrolitlerinin hazırlanaması
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    Supporting ruthenium initiator on PolyHIPE
    (Elsevier Science Bv, 2006) Çetinkaya, Sevil; Khosravi, Ezat; Thompson, Richard
    PolyHIPE samples were successfully synthesised using divinylbenzene and styrene as polymerisable continuous phase, aqueous phase containing potassium persulphate and calcium chloride dihydrate, a mixture of emulsifiers (SPAN20, CTAB and DDBSS) and toluene as a porogen. The PolyHIPE samples 1 and 2 and the PolyHIPE sample 3 were designed to be 90 and 92% porous, respectively, based on the aqueous phase content. PolyHIPE samples were found to be porous and open-cell microstructures with the surface area of 370-430 m(2) g(-1). Alkylidene exchange reactions were carried out between the double bonds of the PolyHIPE and the ruthenium initiator, Ru(=CHPh)(PCy3)(2)Cl-2, for the attachment of the initiator. The amount of initiator loading was determined by phosphorous analysis and for the first time by Rutherford backscattering (RBS) analysis. The loading of the initiator on the PolyHIPE samples, based on phosphorous analysis, was found to be 0.09-0.19 mmol/g. The RBS analysis showed the level of initiator loading to be 0.053-0.097 mmol/g. The level of initiator loading obtained from the phosphorous and the RBS analysis is higher than 0.035 mmol/g reported previously for ruthenium initiator supported on crosslinked polystyrene. However, the level of initiator loading obtained from RBS analysis is lower than that obtained from the phosphorous analysis by ICP-OES. The reason for this discrepancy is believed to be due to inaccuracy of phosphorous analysis as the result of the insolubility of the PolyHIPE supported initiator. (c) 2006 Elsevier B.V. All rights reserved.