TY  - JOUR
AU  - Vodnik, Vesna
AU  - Božanić, D. K.
AU  - Džunuzović, Enis
AU  - Vuković, Jasna
AU  - Nedeljković, Jovan M.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6885
AB  - Surface modified silver nanoparticles dispersed in chloroform were encapsulated in poly(methylmethacrylate) (PMMA) by in-situ radical polymerization of methyl methacrylate initiated by 2,2′-azobisisobutyronitrile. The particle size distribution of colloidal silver nanoparticles was determined using transmission electron microscopy. The obtained transparent nanocomposite films were characterized using UV–vis spectroscopy, 1H NMR spectroscopy and gel permeation chromatography. Effective medium Maxwell-Garnett theory was used in order to explain optical properties of nanocomposite films taking into account inhomogeneous spatial distribution of silver nanoparticles in PMMA matrix. The influence of the silver nanoparticles on the thermal properties of the PMMA matrix was investigated using thermo-gravimetric analysis and differential scanning calorimetry. Thermo-oxidative stability of the PMMA in the presence of low content of inorganic phase is significantly improved. The glass transition temperatures of nanocomposites are slightly lower compared to the pure polymer.
PB  - Elsevier
T2  - European Polymer Journal
T1  - Thermal and optical properties of silver-poly(methylmethacrylate) nanocomposites prepared by in-situ radical polymerization
SP  - 137
EP  - 144
DO  - 10.1016/j.eurpolymj.2009.10.022
ER  - 

@article{
author = "Vodnik, Vesna and Božanić, D. K. and Džunuzović, Enis and Vuković, Jasna and Nedeljković, Jovan M.",
year = "2010",
abstract = "Surface modified silver nanoparticles dispersed in chloroform were encapsulated in poly(methylmethacrylate) (PMMA) by in-situ radical polymerization of methyl methacrylate initiated by 2,2′-azobisisobutyronitrile. The particle size distribution of colloidal silver nanoparticles was determined using transmission electron microscopy. The obtained transparent nanocomposite films were characterized using UV–vis spectroscopy, 1H NMR spectroscopy and gel permeation chromatography. Effective medium Maxwell-Garnett theory was used in order to explain optical properties of nanocomposite films taking into account inhomogeneous spatial distribution of silver nanoparticles in PMMA matrix. The influence of the silver nanoparticles on the thermal properties of the PMMA matrix was investigated using thermo-gravimetric analysis and differential scanning calorimetry. Thermo-oxidative stability of the PMMA in the presence of low content of inorganic phase is significantly improved. The glass transition temperatures of nanocomposites are slightly lower compared to the pure polymer.",
publisher = "Elsevier",
journal = "European Polymer Journal",
title = "Thermal and optical properties of silver-poly(methylmethacrylate) nanocomposites prepared by in-situ radical polymerization",
pages = "137-144",
doi = "10.1016/j.eurpolymj.2009.10.022"
}

Vodnik, V., Božanić, D. K., Džunuzović, E., Vuković, J.,& Nedeljković, J. M.. (2010). Thermal and optical properties of silver-poly(methylmethacrylate) nanocomposites prepared by in-situ radical polymerization. in European Polymer Journal
Elsevier., 137-144.
https://doi.org/10.1016/j.eurpolymj.2009.10.022

Vodnik V, Božanić DK, Džunuzović E, Vuković J, Nedeljković JM. Thermal and optical properties of silver-poly(methylmethacrylate) nanocomposites prepared by in-situ radical polymerization. in European Polymer Journal. 2010;:137-144.
doi:10.1016/j.eurpolymj.2009.10.022 .

Vodnik, Vesna, Božanić, D. K., Džunuzović, Enis, Vuković, Jasna, Nedeljković, Jovan M., "Thermal and optical properties of silver-poly(methylmethacrylate) nanocomposites prepared by in-situ radical polymerization" in European Polymer Journal (2010):137-144,
https://doi.org/10.1016/j.eurpolymj.2009.10.022 . .

TY  - JOUR
AU  - Džunuzović, Enis S.
AU  - Marinović-Cincović, Milena
AU  - Džunuzović, Jasna
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan M.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/726
AB  - Incorporation of inorganic nanoparticles can significantly affect the properties of the polymer matrix. The properties of polymer nanocomposites depend on the type of incorporated nanoparticles, their size and shape, their concentration, and interactions with the polymer matrix. Homogeneity of polymer nanocomposites is influenced very much by the preparation method. In this study, TiO2 nanoparticles surface modified with 6-palmitate ascorbic acid (6-PAA) were encapsulated in poly(methyl methacrylate) (PMMA) by in situ radical polymerization of methyl methacrylate initiated by 2,2'-azobisisobutyronitrile (AIBN). The surface modification of the TiO2 nanoparticles was achieved by the formation of a charge transfer complex between TiO2 nanoparticles and 6-palmitate ascorbic acid. The radical polymerization of MMA in the presence of TiO2-PAA nanoparticles was conducted in solution (PMMA/TiO2-PAA-R), in bulk (PMMA/TiO2-PAA-M) or in suspension (PMMA/TiO2-PAA-S). The main purpose of this study was to investigate the influence of the preparation method on the molar masses and thermal properties of PMMA/TiO2-PAA nanocomposite. It was obtained that molar masses of PMMA extracted from the composites had smaller values compared to molar masses of pure PMMA synthesized in the same manner, which indicated that TiO2-PAA nanoparticles affected the reaction of termination. Thermal properties were investigated by DSC and TGA. The values of glass transition temperature, Tg, were influenced by the way the radical polymerization was conducted, even in the case of the pure PMMA. The Tg of composite samples was always smaller than the value of the corresponding PMMA sample and the smallest value was obtained for PMMA/TiO2-PAA-M since they contained the largest amount of low molar mass residue. The TGA results showed that thermal and thermooxidative stability of polymer composites obtained in solution and in suspension was better than for the pure PMMA obtained in the same way.
AB  - Predmet ovog rada je dobijanje i karakterizacija nanokompozita kod kojih polimernu matricu čini poli(metil metakrilat) (PMMA), a kao neorgansko punilo nanočestice titan-dioksida. Svi uzorci nanokompozita dobijeni su in situ polimerizacijom preko slobodnih radikala metil metakrilata (MMA) u prisustvu čestica punila. Površinska modifikacija korišćenih nanočestica titan-dioksida izvršena je palmitatom askorbinske kiseline. Uzorci nanokompozita su pripremljeni polimerizacijom metil metakrilata u rastvoru, u masi i suspenzionom polimerizacijom. Određene su vrednosti molarne mase PMMA ekstrahovanog iz kompozitnih uzoraka i dobijeno je da su one manje od vrednosti molarne mase čistog PMMA dobijenog na isti način, na osnovu čega se može zaključiti da nanočestice TiO2-PAA prisutne u toku polimerizacije u sva tri slučaja utiču na reakcije terminacije i dovode do smanjenja molarne mase PMMA matrice. Diferencijalnom skenirajućom kalorimetrijom i termogravimetrijskom analizom utvrđeno je i da način sinteze polimerne matrice i koncentracija čestica punila utiču na termička svojstva dobijenih polimernih nanokompozita.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Influence of the way of synthesis of poly(methyl methacrylate) in the presence of surface modified TiO2 nanoparticles on the properties of obtained nanocomposites
T1  - Uticaj načina sinteze poli(metil metakrilata) u prisustvu površinski modifikovanih TiO2 nanočestica na svojstva dobijenih nanokompozita
VL  - 64
IS  - 6
SP  - 473
EP  - 489
DO  - 10.2298/HEMIND100923059D
ER  - 

@article{
author = "Džunuzović, Enis S. and Marinović-Cincović, Milena and Džunuzović, Jasna and Jeremić, Katarina B. and Nedeljković, Jovan M.",
year = "2010",
abstract = "Incorporation of inorganic nanoparticles can significantly affect the properties of the polymer matrix. The properties of polymer nanocomposites depend on the type of incorporated nanoparticles, their size and shape, their concentration, and interactions with the polymer matrix. Homogeneity of polymer nanocomposites is influenced very much by the preparation method. In this study, TiO2 nanoparticles surface modified with 6-palmitate ascorbic acid (6-PAA) were encapsulated in poly(methyl methacrylate) (PMMA) by in situ radical polymerization of methyl methacrylate initiated by 2,2'-azobisisobutyronitrile (AIBN). The surface modification of the TiO2 nanoparticles was achieved by the formation of a charge transfer complex between TiO2 nanoparticles and 6-palmitate ascorbic acid. The radical polymerization of MMA in the presence of TiO2-PAA nanoparticles was conducted in solution (PMMA/TiO2-PAA-R), in bulk (PMMA/TiO2-PAA-M) or in suspension (PMMA/TiO2-PAA-S). The main purpose of this study was to investigate the influence of the preparation method on the molar masses and thermal properties of PMMA/TiO2-PAA nanocomposite. It was obtained that molar masses of PMMA extracted from the composites had smaller values compared to molar masses of pure PMMA synthesized in the same manner, which indicated that TiO2-PAA nanoparticles affected the reaction of termination. Thermal properties were investigated by DSC and TGA. The values of glass transition temperature, Tg, were influenced by the way the radical polymerization was conducted, even in the case of the pure PMMA. The Tg of composite samples was always smaller than the value of the corresponding PMMA sample and the smallest value was obtained for PMMA/TiO2-PAA-M since they contained the largest amount of low molar mass residue. The TGA results showed that thermal and thermooxidative stability of polymer composites obtained in solution and in suspension was better than for the pure PMMA obtained in the same way., Predmet ovog rada je dobijanje i karakterizacija nanokompozita kod kojih polimernu matricu čini poli(metil metakrilat) (PMMA), a kao neorgansko punilo nanočestice titan-dioksida. Svi uzorci nanokompozita dobijeni su in situ polimerizacijom preko slobodnih radikala metil metakrilata (MMA) u prisustvu čestica punila. Površinska modifikacija korišćenih nanočestica titan-dioksida izvršena je palmitatom askorbinske kiseline. Uzorci nanokompozita su pripremljeni polimerizacijom metil metakrilata u rastvoru, u masi i suspenzionom polimerizacijom. Određene su vrednosti molarne mase PMMA ekstrahovanog iz kompozitnih uzoraka i dobijeno je da su one manje od vrednosti molarne mase čistog PMMA dobijenog na isti način, na osnovu čega se može zaključiti da nanočestice TiO2-PAA prisutne u toku polimerizacije u sva tri slučaja utiču na reakcije terminacije i dovode do smanjenja molarne mase PMMA matrice. Diferencijalnom skenirajućom kalorimetrijom i termogravimetrijskom analizom utvrđeno je i da način sinteze polimerne matrice i koncentracija čestica punila utiču na termička svojstva dobijenih polimernih nanokompozita.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Influence of the way of synthesis of poly(methyl methacrylate) in the presence of surface modified TiO2 nanoparticles on the properties of obtained nanocomposites, Uticaj načina sinteze poli(metil metakrilata) u prisustvu površinski modifikovanih TiO2 nanočestica na svojstva dobijenih nanokompozita",
volume = "64",
number = "6",
pages = "473-489",
doi = "10.2298/HEMIND100923059D"
}

Džunuzović, E. S., Marinović-Cincović, M., Džunuzović, J., Jeremić, K. B.,& Nedeljković, J. M.. (2010). Influence of the way of synthesis of poly(methyl methacrylate) in the presence of surface modified TiO2 nanoparticles on the properties of obtained nanocomposites. in Hemijska industrija
Association of Chemical Engineers of Serbia., 64(6), 473-489.
https://doi.org/10.2298/HEMIND100923059D

Džunuzović ES, Marinović-Cincović M, Džunuzović J, Jeremić KB, Nedeljković JM. Influence of the way of synthesis of poly(methyl methacrylate) in the presence of surface modified TiO2 nanoparticles on the properties of obtained nanocomposites. in Hemijska industrija. 2010;64(6):473-489.
doi:10.2298/HEMIND100923059D .

Džunuzović, Enis S., Marinović-Cincović, Milena, Džunuzović, Jasna, Jeremić, Katarina B., Nedeljković, Jovan M., "Influence of the way of synthesis of poly(methyl methacrylate) in the presence of surface modified TiO2 nanoparticles on the properties of obtained nanocomposites" in Hemijska industrija, 64, no. 6 (2010):473-489,
https://doi.org/10.2298/HEMIND100923059D . .

TY  - JOUR
AU  - Vodnik, Vesna
AU  - Vuković, Jasna
AU  - Nedeljković, Jovan M.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3439
AB  - The optical properties of silver nanoparticles
embedded in poly(methylmethacrylate) (PMMA) was investigated
as well as the influence of silver nanoparticles on
the thermal properties of polymer matrix. The average size
and particle size distribution of silver nanoparticles was
determined using transmission electron microscopy. The
obtained transparent nanocomposite films were optically
characterized using UV-Vis and FTIR spectroscopy. Thermal
stability of polymer matrix was improved upon
incorporation of small amount of silver nanoparticles. Also,
silver nanoparticles have pronounced effect on thermooxidative
stability of PMMA matrix. The glass transition
temperatures of nanocomposites are lower compared to the
pure polymer
PB  - Springer
T2  - Colloid and Polymer Science
T1  - Synthesis and characterization of silver—poly(methylmethacrylate) nanocomposites
VL  - 287
IS  - 7
SP  - 847
EP  - 851
DO  - 10.1007/s00396-009-2039-7
ER  - 

@article{
author = "Vodnik, Vesna and Vuković, Jasna and Nedeljković, Jovan M.",
year = "2009",
abstract = "The optical properties of silver nanoparticles
embedded in poly(methylmethacrylate) (PMMA) was investigated
as well as the influence of silver nanoparticles on
the thermal properties of polymer matrix. The average size
and particle size distribution of silver nanoparticles was
determined using transmission electron microscopy. The
obtained transparent nanocomposite films were optically
characterized using UV-Vis and FTIR spectroscopy. Thermal
stability of polymer matrix was improved upon
incorporation of small amount of silver nanoparticles. Also,
silver nanoparticles have pronounced effect on thermooxidative
stability of PMMA matrix. The glass transition
temperatures of nanocomposites are lower compared to the
pure polymer",
publisher = "Springer",
journal = "Colloid and Polymer Science",
title = "Synthesis and characterization of silver—poly(methylmethacrylate) nanocomposites",
volume = "287",
number = "7",
pages = "847-851",
doi = "10.1007/s00396-009-2039-7"
}

Vodnik, V., Vuković, J.,& Nedeljković, J. M.. (2009). Synthesis and characterization of silver—poly(methylmethacrylate) nanocomposites. in Colloid and Polymer Science
Springer., 287(7), 847-851.
https://doi.org/10.1007/s00396-009-2039-7

Vodnik V, Vuković J, Nedeljković JM. Synthesis and characterization of silver—poly(methylmethacrylate) nanocomposites. in Colloid and Polymer Science. 2009;287(7):847-851.
doi:10.1007/s00396-009-2039-7 .

Vodnik, Vesna, Vuković, Jasna, Nedeljković, Jovan M., "Synthesis and characterization of silver—poly(methylmethacrylate) nanocomposites" in Colloid and Polymer Science, 287, no. 7 (2009):847-851,
https://doi.org/10.1007/s00396-009-2039-7 . .

TY  - JOUR
AU  - Džunuzović, Enis
AU  - Marinović -Cincović, M.
AU  - Vuković, Jasna
AU  - Jeremić, K.
AU  - Nedeljković, Jovan
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6803
AB  - The surface of anatase TiO2 nanoparticles, obtained by
the controlled hydrolysis of titanium tetrachloride, was
modified by 6-palmitate ascorbic acid. The surface
modified TiO2 nanoparticles were dispersed in methyl
methacrylate and mixed with a appropriate amount of
poly(methyl methacrylate) to obtain a syrup. The nanocomposite
sheets were made by bulk polymerization of
the syrup in a glass sandwich cell using 2,20-azobisisobutyronitrile
as initiator. The molar masses and molar
mass distributions of synthesized poly(methyl methacrylate)
samples were determined by gel permeation chromatography.
The content of unreacted double bonds in
synthesized samples was determined by 1H NMR spectroscopy.
The influence of TiO2 nanoparticles on the
thermal stability of the poly(methyl methacrylate) matrix
was investigated using thermogravimetric analysis and
differential scanning calorimetry. The synthesized samples
of poly(methyl methacrylate) have different molar
mass and polydispersity depending on the content of
the surface modified TiO2 nanoparticles. The values of
glass transition temperature of so prepared nanocomposite
samples were lower than for pure poly(methyl
methacrylate), while the glass transition temperature of
samples preheated in inert atmosphere was very similar
to the glass transition temperature of pure poly(methyl
methacrylate). The thermal stability of nanocomposite
samples in nitrogen and air was different from thermal
stability of pure poly(methyl methacrylate). POLYM
PB  - Wiley
T2  - Polymer Composites
T1  - Thermal Properties of PMMA/TiO2 Nanocomposites Prepared by In-Situ Bulk Polymerization
VL  - 30
IS  - 6
SP  - 737
EP  - 742
DO  - 10.1002/pc.20606
ER  - 

@article{
author = "Džunuzović, Enis and Marinović -Cincović, M. and Vuković, Jasna and Jeremić, K. and Nedeljković, Jovan",
year = "2009",
abstract = "The surface of anatase TiO2 nanoparticles, obtained by
the controlled hydrolysis of titanium tetrachloride, was
modified by 6-palmitate ascorbic acid. The surface
modified TiO2 nanoparticles were dispersed in methyl
methacrylate and mixed with a appropriate amount of
poly(methyl methacrylate) to obtain a syrup. The nanocomposite
sheets were made by bulk polymerization of
the syrup in a glass sandwich cell using 2,20-azobisisobutyronitrile
as initiator. The molar masses and molar
mass distributions of synthesized poly(methyl methacrylate)
samples were determined by gel permeation chromatography.
The content of unreacted double bonds in
synthesized samples was determined by 1H NMR spectroscopy.
The influence of TiO2 nanoparticles on the
thermal stability of the poly(methyl methacrylate) matrix
was investigated using thermogravimetric analysis and
differential scanning calorimetry. The synthesized samples
of poly(methyl methacrylate) have different molar
mass and polydispersity depending on the content of
the surface modified TiO2 nanoparticles. The values of
glass transition temperature of so prepared nanocomposite
samples were lower than for pure poly(methyl
methacrylate), while the glass transition temperature of
samples preheated in inert atmosphere was very similar
to the glass transition temperature of pure poly(methyl
methacrylate). The thermal stability of nanocomposite
samples in nitrogen and air was different from thermal
stability of pure poly(methyl methacrylate). POLYM",
publisher = "Wiley",
journal = "Polymer Composites",
title = "Thermal Properties of PMMA/TiO2 Nanocomposites Prepared by In-Situ Bulk Polymerization",
volume = "30",
number = "6",
pages = "737-742",
doi = "10.1002/pc.20606"
}

Džunuzović, E., Marinović -Cincović, M., Vuković, J., Jeremić, K.,& Nedeljković, J.. (2009). Thermal Properties of PMMA/TiO2 Nanocomposites Prepared by In-Situ Bulk Polymerization. in Polymer Composites
Wiley., 30(6), 737-742.
https://doi.org/10.1002/pc.20606

Džunuzović E, Marinović -Cincović M, Vuković J, Jeremić K, Nedeljković J. Thermal Properties of PMMA/TiO2 Nanocomposites Prepared by In-Situ Bulk Polymerization. in Polymer Composites. 2009;30(6):737-742.
doi:10.1002/pc.20606 .

Džunuzović, Enis, Marinović -Cincović, M., Vuković, Jasna, Jeremić, K., Nedeljković, Jovan, "Thermal Properties of PMMA/TiO2 Nanocomposites Prepared by In-Situ Bulk Polymerization" in Polymer Composites, 30, no. 6 (2009):737-742,
https://doi.org/10.1002/pc.20606 . .

TY  - JOUR
AU  - Džunuzović, Enis
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Vuković, Jasna
AU  - Nedeljković, Jovan
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6797
AB  - α-Fe2O3 nanorods were incorporated into poly(methyl methacrylate) (PMMA) by in situ radical polymerisation of methyl methacrylate initiated by 2,2′-azobisisobutyronitrile. The α-Fe2O3 nanorods were synthesized by forced hydrolysis of FeCl3 and structural characterization was performed by X-ray diffraction and transmission electron microscopy. The molar mass and the polydispersity index of synthesized PMMA samples were determined by gel permeation chromatography. The content of residual monomer was determined by 1H NMR spectroscopy. The influence of α-Fe2O3 nanorods on the thermal stability of the polymer was investigated using thermogravimetry and differential scanning calorimetry. The molar mass and polydispersity index of PMMA were dependent on the content of α-Fe2O3 nanorods. The values of the glass transition temperature of the nanocomposites were lower compared to pure PMMA. Also, the thermal stability of nanocomposites in nitrogen and air was different from that of pure PMMA.
PB  - Elsevier
T2  - Polymer Degradation and Stability
T1  - Influence of α-Fe2O3 nanorods on the thermal stability of poly(methyl methacrylate) synthesized by in situ bulk polymerisation of methyl methacrylate
SP  - 77
EP  - 83
DO  - 10.1016/j.polymdegradstab.2007.10.015
ER  - 

@article{
author = "Džunuzović, Enis and Marinović-Cincović, Milena and Jeremić, Katarina B. and Vuković, Jasna and Nedeljković, Jovan",
year = "2008",
abstract = "α-Fe2O3 nanorods were incorporated into poly(methyl methacrylate) (PMMA) by in situ radical polymerisation of methyl methacrylate initiated by 2,2′-azobisisobutyronitrile. The α-Fe2O3 nanorods were synthesized by forced hydrolysis of FeCl3 and structural characterization was performed by X-ray diffraction and transmission electron microscopy. The molar mass and the polydispersity index of synthesized PMMA samples were determined by gel permeation chromatography. The content of residual monomer was determined by 1H NMR spectroscopy. The influence of α-Fe2O3 nanorods on the thermal stability of the polymer was investigated using thermogravimetry and differential scanning calorimetry. The molar mass and polydispersity index of PMMA were dependent on the content of α-Fe2O3 nanorods. The values of the glass transition temperature of the nanocomposites were lower compared to pure PMMA. Also, the thermal stability of nanocomposites in nitrogen and air was different from that of pure PMMA.",
publisher = "Elsevier",
journal = "Polymer Degradation and Stability",
title = "Influence of α-Fe2O3 nanorods on the thermal stability of poly(methyl methacrylate) synthesized by in situ bulk polymerisation of methyl methacrylate",
pages = "77-83",
doi = "10.1016/j.polymdegradstab.2007.10.015"
}

Džunuzović, E., Marinović-Cincović, M., Jeremić, K. B., Vuković, J.,& Nedeljković, J.. (2008). Influence of α-Fe2O3 nanorods on the thermal stability of poly(methyl methacrylate) synthesized by in situ bulk polymerisation of methyl methacrylate. in Polymer Degradation and Stability
Elsevier., 77-83.
https://doi.org/10.1016/j.polymdegradstab.2007.10.015

Džunuzović E, Marinović-Cincović M, Jeremić KB, Vuković J, Nedeljković J. Influence of α-Fe2O3 nanorods on the thermal stability of poly(methyl methacrylate) synthesized by in situ bulk polymerisation of methyl methacrylate. in Polymer Degradation and Stability. 2008;:77-83.
doi:10.1016/j.polymdegradstab.2007.10.015 .

Džunuzović, Enis, Marinović-Cincović, Milena, Jeremić, Katarina B., Vuković, Jasna, Nedeljković, Jovan, "Influence of α-Fe2O3 nanorods on the thermal stability of poly(methyl methacrylate) synthesized by in situ bulk polymerisation of methyl methacrylate" in Polymer Degradation and Stability (2008):77-83,
https://doi.org/10.1016/j.polymdegradstab.2007.10.015 . .