TY  - JOUR
AU  - Džunuzović, Jasna V.
AU  - Pergal, Marija V.
AU  - Poreba, Rafal
AU  - Vodnik, Vesna
AU  - Simonović, Branislav R.
AU  - Spirkova, Milena
AU  - Jovanovic, Slobodan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5229
AB  - Six polyurethane networks were synthesized from Boltorn (R) hyperbranched polyester of the second pseudo generation, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Journal of Non-crystalline Solids
T1  - Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester
VL  - 358
IS  - 23
SP  - 3161
EP  - 3169
DO  - 10.1016/j.jnoncrysol.2012.09.013
ER  - 

@article{
author = "Džunuzović, Jasna V. and Pergal, Marija V. and Poreba, Rafal and Vodnik, Vesna and Simonović, Branislav R. and Spirkova, Milena and Jovanovic, Slobodan",
year = "2012",
abstract = "Six polyurethane networks were synthesized from Boltorn (R) hyperbranched polyester of the second pseudo generation, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Journal of Non-crystalline Solids",
title = "Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester",
volume = "358",
number = "23",
pages = "3161-3169",
doi = "10.1016/j.jnoncrysol.2012.09.013"
}

Džunuzović, J. V., Pergal, M. V., Poreba, R., Vodnik, V., Simonović, B. R., Spirkova, M.,& Jovanovic, S.. (2012). Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester. in Journal of Non-crystalline Solids, 358(23), 3161-3169.
https://doi.org/10.1016/j.jnoncrysol.2012.09.013

Džunuzović JV, Pergal MV, Poreba R, Vodnik V, Simonović BR, Spirkova M, Jovanovic S. Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester. in Journal of Non-crystalline Solids. 2012;358(23):3161-3169.
doi:10.1016/j.jnoncrysol.2012.09.013 .

Džunuzović, Jasna V., Pergal, Marija V., Poreba, Rafal, Vodnik, Vesna, Simonović, Branislav R., Spirkova, Milena, Jovanovic, Slobodan, "Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester" in Journal of Non-crystalline Solids, 358, no. 23 (2012):3161-3169,
https://doi.org/10.1016/j.jnoncrysol.2012.09.013 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Milivojević, Dušan
AU  - Blanuša, Jovan
AU  - Spasojević, Vojislav
AU  - Bibić, Nataša M.
AU  - Simonović, Branislav R.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3455
AB  - Polycrystalline Zn -Mn -O samples with nominal manganese concentration x = 0.01 and 0.10 were synthesized by a solid state reaction route using (ZnC(2)O(4) center dot 2H(2)O)(1-x) and (MnC(2)O(4) center dot 2H(2)O)(x). Thermal treatment of the samples was carried out in air at temperatures of 673, 773 and 1173 K. The samples were investigated by x-ray diffraction, thermogravimetry, differential thermal analysis, transmission electron microscopy, magnetization measurements and electron paramagnetic resonance. Room temperature ferromagnetism is observed in Zn -Mn -O samples with x = 0.01 thermally treated at low temperatures (673, 773 K). It seems that the ferromagnetic phase could originate from interactions between Mn(2+) ions and acceptor defects incorporated in the ZnO crystal lattice during the thermal treatment of the samples.
T2  - Journal of Physics: Condensed Matter
T1  - Ferromagnetic properties of the Zn-Mn-Osystem
VL  - 20
IS  - 23
DO  - 10.1088/0953-8984/20/23/235217
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Milivojević, Dušan and Blanuša, Jovan and Spasojević, Vojislav and Bibić, Nataša M. and Simonović, Branislav R.",
year = "2008",
abstract = "Polycrystalline Zn -Mn -O samples with nominal manganese concentration x = 0.01 and 0.10 were synthesized by a solid state reaction route using (ZnC(2)O(4) center dot 2H(2)O)(1-x) and (MnC(2)O(4) center dot 2H(2)O)(x). Thermal treatment of the samples was carried out in air at temperatures of 673, 773 and 1173 K. The samples were investigated by x-ray diffraction, thermogravimetry, differential thermal analysis, transmission electron microscopy, magnetization measurements and electron paramagnetic resonance. Room temperature ferromagnetism is observed in Zn -Mn -O samples with x = 0.01 thermally treated at low temperatures (673, 773 K). It seems that the ferromagnetic phase could originate from interactions between Mn(2+) ions and acceptor defects incorporated in the ZnO crystal lattice during the thermal treatment of the samples.",
journal = "Journal of Physics: Condensed Matter",
title = "Ferromagnetic properties of the Zn-Mn-Osystem",
volume = "20",
number = "23",
doi = "10.1088/0953-8984/20/23/235217"
}

Babić-Stojić, B. S., Milivojević, D., Blanuša, J., Spasojević, V., Bibić, N. M.,& Simonović, B. R.. (2008). Ferromagnetic properties of the Zn-Mn-Osystem. in Journal of Physics: Condensed Matter, 20(23).
https://doi.org/10.1088/0953-8984/20/23/235217

Babić-Stojić BS, Milivojević D, Blanuša J, Spasojević V, Bibić NM, Simonović BR. Ferromagnetic properties of the Zn-Mn-Osystem. in Journal of Physics: Condensed Matter. 2008;20(23).
doi:10.1088/0953-8984/20/23/235217 .

Babić-Stojić, Branka S., Milivojević, Dušan, Blanuša, Jovan, Spasojević, Vojislav, Bibić, Nataša M., Simonović, Branislav R., "Ferromagnetic properties of the Zn-Mn-Osystem" in Journal of Physics: Condensed Matter, 20, no. 23 (2008),
https://doi.org/10.1088/0953-8984/20/23/235217 . .

TY  - JOUR
AU  - Marčeta Kaninski, Milica
AU  - Nikolić, Vladimir M.
AU  - Potkonjak, Tanja N.
AU  - Simonović, Branislav R.
AU  - Potkonjak, Nebojša I.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3185
AB  - In continuous search for advanced electrocatalytic materials for the hydrogen evolution reaction (HER), based on transition metal series, two types of intermetallic compounds, TiPt and MoPt2, were investigated as cathode materials. Additionally, ionic activator (i.a.), the mixture of Na-molybdate and tris(ethylenediamine)Co(III) chloride, was in situ added into electrolyte, 6 M aqueous potassium hydroxide solution. The objective was to qualitatively compare their electrocatalytic efficiency evaluated by quasi-potentiostatic and galvanostatic technique. Results are presented to show: the Tafel slope, the exchange current density, the overpotential needed for a fixed hydrogen production rate and the apparent energy of activation. Obtained kinetic parameters reveal advanced catalytic ability of the MoPt2 over the TiPt cathode towards HER. Also, important step forward was achieved by using ionic activator. The presence of Mo and Co species attached to the cathode surface was confirmed by XRF analysis. Thus, enhanced catalytic activity was assigned to the formation of Mo-Co-based electrodeposit. Results suggest to significant catalytic performance of the MoPt2 cathode specially if used with ionic activator in alkaline water electrolysis. (c) 2007 Elsevier B.V. All rights reserved.
T2  - Applied Catalysis. A: General
T1  - Catalytic activity of Pt-based intermetallics for the hydrogen production - Influence of ionic activator
VL  - 321
IS  - 1
SP  - 93
EP  - 99
DO  - 10.1016/j.apcata.2007.01.036
ER  - 

@article{
author = "Marčeta Kaninski, Milica and Nikolić, Vladimir M. and Potkonjak, Tanja N. and Simonović, Branislav R. and Potkonjak, Nebojša I.",
year = "2007",
abstract = "In continuous search for advanced electrocatalytic materials for the hydrogen evolution reaction (HER), based on transition metal series, two types of intermetallic compounds, TiPt and MoPt2, were investigated as cathode materials. Additionally, ionic activator (i.a.), the mixture of Na-molybdate and tris(ethylenediamine)Co(III) chloride, was in situ added into electrolyte, 6 M aqueous potassium hydroxide solution. The objective was to qualitatively compare their electrocatalytic efficiency evaluated by quasi-potentiostatic and galvanostatic technique. Results are presented to show: the Tafel slope, the exchange current density, the overpotential needed for a fixed hydrogen production rate and the apparent energy of activation. Obtained kinetic parameters reveal advanced catalytic ability of the MoPt2 over the TiPt cathode towards HER. Also, important step forward was achieved by using ionic activator. The presence of Mo and Co species attached to the cathode surface was confirmed by XRF analysis. Thus, enhanced catalytic activity was assigned to the formation of Mo-Co-based electrodeposit. Results suggest to significant catalytic performance of the MoPt2 cathode specially if used with ionic activator in alkaline water electrolysis. (c) 2007 Elsevier B.V. All rights reserved.",
journal = "Applied Catalysis. A: General",
title = "Catalytic activity of Pt-based intermetallics for the hydrogen production - Influence of ionic activator",
volume = "321",
number = "1",
pages = "93-99",
doi = "10.1016/j.apcata.2007.01.036"
}

Marčeta Kaninski, M., Nikolić, V. M., Potkonjak, T. N., Simonović, B. R.,& Potkonjak, N. I.. (2007). Catalytic activity of Pt-based intermetallics for the hydrogen production - Influence of ionic activator. in Applied Catalysis. A: General, 321(1), 93-99.
https://doi.org/10.1016/j.apcata.2007.01.036

Marčeta Kaninski M, Nikolić VM, Potkonjak TN, Simonović BR, Potkonjak NI. Catalytic activity of Pt-based intermetallics for the hydrogen production - Influence of ionic activator. in Applied Catalysis. A: General. 2007;321(1):93-99.
doi:10.1016/j.apcata.2007.01.036 .

Marčeta Kaninski, Milica, Nikolić, Vladimir M., Potkonjak, Tanja N., Simonović, Branislav R., Potkonjak, Nebojša I., "Catalytic activity of Pt-based intermetallics for the hydrogen production - Influence of ionic activator" in Applied Catalysis. A: General, 321, no. 1 (2007):93-99,
https://doi.org/10.1016/j.apcata.2007.01.036 . .

TY  - CONF
AU  - Potkonjak, Nebojša I.
AU  - Nikolić, Vladimir M.
AU  - Blagojević, Stevan N.
AU  - Simonović, Branislav R.
AU  - Potkonjak, Tanja N.
AU  - Marčeta Kaninski, Milica
AU  - Sužnjević, Desanka Ž.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9419
AB  - Enhancement of the electrocatalytic effect of Ni electrode for hydrogen evolution reaction (HER) by co-electrodeposited V and Co at metallic Ni (Ni-V-Co) was studied by using quasi-potentiostatic polarization technique from 1 M KOH at 25 ºC. The obtained exchange current density for HER with Ni-V-Co electrode, (5.5x10-4 Acm-2), is about two orders of magnitude higher than for metallic Ni electrode. The results suggested the existence of the synergetic effect of V and Co deposit on the catalytic activity of Ni electrode for HER. By using X-ray fluorescence (XRF) analysis the presence of Co and V at metallic Ni support was proved.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry
T1  - Enhancement of the electrocatalytic activity of Ni electrode for hydrogen evolution by electrodeposited V and Co on its surface
SP  - 335
EP  - 337
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9419
ER  - 

@conference{
author = "Potkonjak, Nebojša I. and Nikolić, Vladimir M. and Blagojević, Stevan N. and Simonović, Branislav R. and Potkonjak, Tanja N. and Marčeta Kaninski, Milica and Sužnjević, Desanka Ž.",
year = "2006",
abstract = "Enhancement of the electrocatalytic effect of Ni electrode for hydrogen evolution reaction (HER) by co-electrodeposited V and Co at metallic Ni (Ni-V-Co) was studied by using quasi-potentiostatic polarization technique from 1 M KOH at 25 ºC. The obtained exchange current density for HER with Ni-V-Co electrode, (5.5x10-4 Acm-2), is about two orders of magnitude higher than for metallic Ni electrode. The results suggested the existence of the synergetic effect of V and Co deposit on the catalytic activity of Ni electrode for HER. By using X-ray fluorescence (XRF) analysis the presence of Co and V at metallic Ni support was proved.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry",
title = "Enhancement of the electrocatalytic activity of Ni electrode for hydrogen evolution by electrodeposited V and Co on its surface",
pages = "335-337",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9419"
}

Potkonjak, N. I., Nikolić, V. M., Blagojević, S. N., Simonović, B. R., Potkonjak, T. N., Marčeta Kaninski, M.,& Sužnjević, D. Ž.. (2006). Enhancement of the electrocatalytic activity of Ni electrode for hydrogen evolution by electrodeposited V and Co on its surface. in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry
Society of Physical Chemists of Serbia., 335-337.
https://hdl.handle.net/21.15107/rcub_vinar_9419

Potkonjak NI, Nikolić VM, Blagojević SN, Simonović BR, Potkonjak TN, Marčeta Kaninski M, Sužnjević DŽ. Enhancement of the electrocatalytic activity of Ni electrode for hydrogen evolution by electrodeposited V and Co on its surface. in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry. 2006;:335-337.
https://hdl.handle.net/21.15107/rcub_vinar_9419 .

Potkonjak, Nebojša I., Nikolić, Vladimir M., Blagojević, Stevan N., Simonović, Branislav R., Potkonjak, Tanja N., Marčeta Kaninski, Milica, Sužnjević, Desanka Ž., "Enhancement of the electrocatalytic activity of Ni electrode for hydrogen evolution by electrodeposited V and Co on its surface" in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry (2006):335-337,
https://hdl.handle.net/21.15107/rcub_vinar_9419 .