TY  - JOUR
AU  - Popović, Mlađan
AU  - Vukić, Nevena
AU  - Điporović-Momčilović, Milanka
AU  - Budinski-Simendić, Jaroslava
AU  - Gavrilović-Grmuša, Ivana
AU  - Popović, Jasmina
AU  - Ristić, Ivan
PY  - 2022
UR  - https://omorika.sfb.bg.ac.rs/handle/123456789/1346
AB  - Addition of poly(diallyldimethylammonium chloride) (PDDA) on the performances of ureaformaldehyde (UF) adhesives was evaluated in this work. Three types of UF adhesives were prepared, one without PDDA addition, and two types with PDDA addition of 1 and 3 wt.% per dry UF adhesive mass. These UF adhesive systems were used for producing experimental particleboard panels. The addition of PDDA decreased the thickness swelling of the panel samples, while the internal bond of the particleboards increased significantly only at the highest PDDA content (3 wt.%). Differential scanning calorimetry (DSC) was applied to address the influence of PDDA on UF adhesive curing kinetics. DSC scans were performed in non-isothermal regimes using different heating rates (5, 10, and 20 degrees C.min(-1)). The activation energy (Ea) of the curing reaction showed slightly lower values for the UF adhesive systems containing PDDA. However, the peak temperatures and enthalpy of reaction did not change significantly. The Kissinger-Akahira-Sunose and Friedman iso-conversional methods were applied to investigate the effects of PDDA addition on the UF adhesive curing process.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Effects of Poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards
EP  - 28
IS  - 1
SP  - 19
VL  - 76
DO  - 10.2298/HEMIND210914001P
UR  - conv_1618
ER  - 

@article{
author = "Popović, Mlađan and Vukić, Nevena and Điporović-Momčilović, Milanka and Budinski-Simendić, Jaroslava and Gavrilović-Grmuša, Ivana and Popović, Jasmina and Ristić, Ivan",
year = "2022",
abstract = "Addition of poly(diallyldimethylammonium chloride) (PDDA) on the performances of ureaformaldehyde (UF) adhesives was evaluated in this work. Three types of UF adhesives were prepared, one without PDDA addition, and two types with PDDA addition of 1 and 3 wt.% per dry UF adhesive mass. These UF adhesive systems were used for producing experimental particleboard panels. The addition of PDDA decreased the thickness swelling of the panel samples, while the internal bond of the particleboards increased significantly only at the highest PDDA content (3 wt.%). Differential scanning calorimetry (DSC) was applied to address the influence of PDDA on UF adhesive curing kinetics. DSC scans were performed in non-isothermal regimes using different heating rates (5, 10, and 20 degrees C.min(-1)). The activation energy (Ea) of the curing reaction showed slightly lower values for the UF adhesive systems containing PDDA. However, the peak temperatures and enthalpy of reaction did not change significantly. The Kissinger-Akahira-Sunose and Friedman iso-conversional methods were applied to investigate the effects of PDDA addition on the UF adhesive curing process.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Effects of Poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards",
pages = "28-19",
number = "1",
volume = "76",
doi = "10.2298/HEMIND210914001P",
url = "conv_1618"
}

Popović, M., Vukić, N., Điporović-Momčilović, M., Budinski-Simendić, J., Gavrilović-Grmuša, I., Popović, J.,& Ristić, I.. (2022). Effects of Poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 76(1), 19-28.
https://doi.org/10.2298/HEMIND210914001P
conv_1618

Popović M, Vukić N, Điporović-Momčilović M, Budinski-Simendić J, Gavrilović-Grmuša I, Popović J, Ristić I. Effects of Poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards. in Hemijska industrija. 2022;76(1):19-28.
doi:10.2298/HEMIND210914001P
conv_1618 .

Popović, Mlađan, Vukić, Nevena, Điporović-Momčilović, Milanka, Budinski-Simendić, Jaroslava, Gavrilović-Grmuša, Ivana, Popović, Jasmina, Ristić, Ivan, "Effects of Poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards" in Hemijska industrija, 76, no. 1 (2022):19-28,
https://doi.org/10.2298/HEMIND210914001P .,
conv_1618 .

TY  - JOUR
AU  - Budinski, Natalija
AU  - Takaci, Đurđica
AU  - Jovičić, Mirjana
AU  - Pavličević, Jelena
AU  - Ristić, Ivan
AU  - Vukić, Nevena
AU  - Teofilović, Vesna
AU  - Popović, Mlađan
PY  - 2015
UR  - https://omorika.sfb.bg.ac.rs/handle/123456789/645
AB  - We discuss a new educational approach for teaching Materials Science and Engineering (MSE). MSE can be introduced to high school students via classes of Mathematics. We describe how such students are introduced to MSE experiments by scientists from the Faculty of Technology of the University of Novi Sad. Subsequently, students share their experiences with their peers. Application of our approach accomplishes at least two objectives. First, students see Applied Mathematics via demonstrated connections between Mathematics and MSE. Second, MSE appears on their radar when they reach the stage of choosing their major at the college level and thus their future professions. This is important since most high school students do not get in contact with exhibitions of the Materials Research Society or with other MSE related activities of professional societies.
T2  - Journal of Materials Education
T1  - Materials science experiments as a tool for learning and applying high school mathematics
EP  - 84
IS  - 1-2
SP  - 59
VL  - 37
UR  - conv_1161
ER  - 

@article{
author = "Budinski, Natalija and Takaci, Đurđica and Jovičić, Mirjana and Pavličević, Jelena and Ristić, Ivan and Vukić, Nevena and Teofilović, Vesna and Popović, Mlađan",
year = "2015",
abstract = "We discuss a new educational approach for teaching Materials Science and Engineering (MSE). MSE can be introduced to high school students via classes of Mathematics. We describe how such students are introduced to MSE experiments by scientists from the Faculty of Technology of the University of Novi Sad. Subsequently, students share their experiences with their peers. Application of our approach accomplishes at least two objectives. First, students see Applied Mathematics via demonstrated connections between Mathematics and MSE. Second, MSE appears on their radar when they reach the stage of choosing their major at the college level and thus their future professions. This is important since most high school students do not get in contact with exhibitions of the Materials Research Society or with other MSE related activities of professional societies.",
journal = "Journal of Materials Education",
title = "Materials science experiments as a tool for learning and applying high school mathematics",
pages = "84-59",
number = "1-2",
volume = "37",
url = "conv_1161"
}

Budinski, N., Takaci, Đ., Jovičić, M., Pavličević, J., Ristić, I., Vukić, N., Teofilović, V.,& Popović, M.. (2015). Materials science experiments as a tool for learning and applying high school mathematics. in Journal of Materials Education, 37(1-2), 59-84.
conv_1161

Budinski N, Takaci Đ, Jovičić M, Pavličević J, Ristić I, Vukić N, Teofilović V, Popović M. Materials science experiments as a tool for learning and applying high school mathematics. in Journal of Materials Education. 2015;37(1-2):59-84.
conv_1161 .

Budinski, Natalija, Takaci, Đurđica, Jovičić, Mirjana, Pavličević, Jelena, Ristić, Ivan, Vukić, Nevena, Teofilović, Vesna, Popović, Mlađan, "Materials science experiments as a tool for learning and applying high school mathematics" in Journal of Materials Education, 37, no. 1-2 (2015):59-84,
conv_1161 .

TY  - JOUR
AU  - Popović, Mlađan
AU  - Miljković, Jovan
AU  - Budinski-Simendić, Jaroslava
AU  - Pavličević, Jelena
AU  - Ristić, Ivan
PY  - 2011
UR  - https://omorika.sfb.bg.ac.rs/handle/123456789/370
AB  - Urea-formaldehyde (UF) resin presents, by far, the most utilized adhesive system in the manufacture of particleboard and fiberboard. At the temperatures above 100 degrees C in the presence of catalyst, this resin undergoes cross-linking reaction and bonding of wood particles in a hot press. In this work the cross-linking of the new type of commercial UF adhesive for E1 type of wood based panels was studied using infra red (IR) spectroscopy and differential scanning calorimetry (DSC). IR spectra of examined UF adhesive showed distinctive characteristics in comparison to the older types of UF adhesives. The influence of different industrial wood species (obtained from beech, fir and poplar) on the curing behavior of wood-flour/adhesive mixtures has been evaluated using DSC method. The peak temperature and enthalpy of the curing reaction were evaluated from scans obtained with different heating rates. The activation energy for the curing reaction of pure adhesive and for wood-flour/adhesive mixtures was calculated using the Kissinger method.
T2  - Wood Research
T1  - Curing characteristics of low emission urea-formaldehyde adhesive in the presence of wood
EP  - 600
IS  - 4
SP  - 589
VL  - 56
UR  - conv_2213
ER  - 

@article{
author = "Popović, Mlađan and Miljković, Jovan and Budinski-Simendić, Jaroslava and Pavličević, Jelena and Ristić, Ivan",
year = "2011",
abstract = "Urea-formaldehyde (UF) resin presents, by far, the most utilized adhesive system in the manufacture of particleboard and fiberboard. At the temperatures above 100 degrees C in the presence of catalyst, this resin undergoes cross-linking reaction and bonding of wood particles in a hot press. In this work the cross-linking of the new type of commercial UF adhesive for E1 type of wood based panels was studied using infra red (IR) spectroscopy and differential scanning calorimetry (DSC). IR spectra of examined UF adhesive showed distinctive characteristics in comparison to the older types of UF adhesives. The influence of different industrial wood species (obtained from beech, fir and poplar) on the curing behavior of wood-flour/adhesive mixtures has been evaluated using DSC method. The peak temperature and enthalpy of the curing reaction were evaluated from scans obtained with different heating rates. The activation energy for the curing reaction of pure adhesive and for wood-flour/adhesive mixtures was calculated using the Kissinger method.",
journal = "Wood Research",
title = "Curing characteristics of low emission urea-formaldehyde adhesive in the presence of wood",
pages = "600-589",
number = "4",
volume = "56",
url = "conv_2213"
}

Popović, M., Miljković, J., Budinski-Simendić, J., Pavličević, J.,& Ristić, I.. (2011). Curing characteristics of low emission urea-formaldehyde adhesive in the presence of wood. in Wood Research, 56(4), 589-600.
conv_2213

Popović M, Miljković J, Budinski-Simendić J, Pavličević J, Ristić I. Curing characteristics of low emission urea-formaldehyde adhesive in the presence of wood. in Wood Research. 2011;56(4):589-600.
conv_2213 .

Popović, Mlađan, Miljković, Jovan, Budinski-Simendić, Jaroslava, Pavličević, Jelena, Ristić, Ivan, "Curing characteristics of low emission urea-formaldehyde adhesive in the presence of wood" in Wood Research, 56, no. 4 (2011):589-600,
conv_2213 .

TY  - JOUR
AU  - Popović, Mlađan
AU  - Budinski-Simendić, Jaroslava
AU  - Jovičić, Mirjana
AU  - Mursics, Joszef
AU  - Điporović-Momčilović, Milanka
AU  - Pavličević, Jelena
AU  - Ristić, Ivan
PY  - 2011
UR  - https://omorika.sfb.bg.ac.rs/handle/123456789/402
AB  - Metoda diferencijalne skanirajuće kalorimetrije (DSC) upotrebljena je za određivanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva sa različitim molskim odnosom formaldehida i uree (F/U). Merenja su obavljena u dinamičkom režimu pri brzinama zagrevanja od 5, 10, 15 i 20°C·min-1. Na osnovu vrednosti temperature maksimuma na egzotermnom piku DSC krive vidi se da adheziv UF1 umrežava na nižim temperaturama (adheziv sa višim molskim odnosom F/U), što odgovara nižoj izračunatoj vrednosti energije aktivacije, Ea, za isti adheziv koja iznosi 73,4 kJ·mol-1 u poređenju sa 77,7 kJ·mol-1 za adheziv UF2. Dobijeni podaci takođe su analizirani pomoću modela izokonverzije OFW (Ozawa-Flynn-Wall) i KAS (Kissinger-Akahira-Sunose). Oba primenjena modela ukazuju na uticaj stepena umrežavanja na energiju aktivacije, pri čemu je KAS kinetički model pokazao nešto niže vrednosti energije aktivacije. Zanimljivo je uočiti različito ponašanje ispitivanih adheziva tokom njihovog umrežavanja. Rezultati ispitivanja pokazuju rast energije aktivacije sa porastom stepena konverzije kod adheziva UF1, dok je konstantno smanjenje Ea tokom reakcije umrežavanja karakteristično za adheziv UF2. Pored navedenog, obavljena su DSC merenja pri različitom dodatku amonijum-hlorida kao katalizatora i pri brzini zagrevanja od 10°C·min-1. Rezultati merenja ukazali su da povećanje dodatka katalizatora od 0,2 do 1,0% utiče na povećanje entalpije reakcije kod adheziva UF2, dok isti uticaj nije zabeležen kod adheziva UF1.
AB  - Differential scanning calorimetry (DSC) was used to evaluate the curing kinetics of two commercial urea-formaldehyde (UF) adhesives having different formaldehyde to urea (F/U) ratio of 1.112 (UF1) and 1.086 (UF2). DSC measurements were done in dynamic scanning regime with heating rates of 5, 10, 15 and 20°C/min in order to determine the activation energy for each adhesive. Obtained data were analyzed using isoconversional methods with application of Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose kinetic models. In addition, different catalyst levels were tested at the heating rate of 10°C/min. The results showed that the adhesive with higher F/U ratio achieved higher activation energy, while having lower peak temperature of curing reaction. It was also noticed that the increase of catalyst level influenced the increase of reaction enthalpy of the adhesive with lower F/U ratio.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Izučavanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva primenom metode izokonverzije
T1  - Curing kinetics of two commercial urea-formaldehyde adhesives studied by isoconversional method
EP  - 726
IS  - 6
SP  - 717
VL  - 65
DO  - 10.2298/HEMIND110912088P
UR  - conv_627
ER  - 

@article{
author = "Popović, Mlađan and Budinski-Simendić, Jaroslava and Jovičić, Mirjana and Mursics, Joszef and Điporović-Momčilović, Milanka and Pavličević, Jelena and Ristić, Ivan",
year = "2011",
abstract = "Metoda diferencijalne skanirajuće kalorimetrije (DSC) upotrebljena je za određivanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva sa različitim molskim odnosom formaldehida i uree (F/U). Merenja su obavljena u dinamičkom režimu pri brzinama zagrevanja od 5, 10, 15 i 20°C·min-1. Na osnovu vrednosti temperature maksimuma na egzotermnom piku DSC krive vidi se da adheziv UF1 umrežava na nižim temperaturama (adheziv sa višim molskim odnosom F/U), što odgovara nižoj izračunatoj vrednosti energije aktivacije, Ea, za isti adheziv koja iznosi 73,4 kJ·mol-1 u poređenju sa 77,7 kJ·mol-1 za adheziv UF2. Dobijeni podaci takođe su analizirani pomoću modela izokonverzije OFW (Ozawa-Flynn-Wall) i KAS (Kissinger-Akahira-Sunose). Oba primenjena modela ukazuju na uticaj stepena umrežavanja na energiju aktivacije, pri čemu je KAS kinetički model pokazao nešto niže vrednosti energije aktivacije. Zanimljivo je uočiti različito ponašanje ispitivanih adheziva tokom njihovog umrežavanja. Rezultati ispitivanja pokazuju rast energije aktivacije sa porastom stepena konverzije kod adheziva UF1, dok je konstantno smanjenje Ea tokom reakcije umrežavanja karakteristično za adheziv UF2. Pored navedenog, obavljena su DSC merenja pri različitom dodatku amonijum-hlorida kao katalizatora i pri brzini zagrevanja od 10°C·min-1. Rezultati merenja ukazali su da povećanje dodatka katalizatora od 0,2 do 1,0% utiče na povećanje entalpije reakcije kod adheziva UF2, dok isti uticaj nije zabeležen kod adheziva UF1., Differential scanning calorimetry (DSC) was used to evaluate the curing kinetics of two commercial urea-formaldehyde (UF) adhesives having different formaldehyde to urea (F/U) ratio of 1.112 (UF1) and 1.086 (UF2). DSC measurements were done in dynamic scanning regime with heating rates of 5, 10, 15 and 20°C/min in order to determine the activation energy for each adhesive. Obtained data were analyzed using isoconversional methods with application of Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose kinetic models. In addition, different catalyst levels were tested at the heating rate of 10°C/min. The results showed that the adhesive with higher F/U ratio achieved higher activation energy, while having lower peak temperature of curing reaction. It was also noticed that the increase of catalyst level influenced the increase of reaction enthalpy of the adhesive with lower F/U ratio.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Izučavanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva primenom metode izokonverzije, Curing kinetics of two commercial urea-formaldehyde adhesives studied by isoconversional method",
pages = "726-717",
number = "6",
volume = "65",
doi = "10.2298/HEMIND110912088P",
url = "conv_627"
}

Popović, M., Budinski-Simendić, J., Jovičić, M., Mursics, J., Điporović-Momčilović, M., Pavličević, J.,& Ristić, I.. (2011). Izučavanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva primenom metode izokonverzije. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 65(6), 717-726.
https://doi.org/10.2298/HEMIND110912088P
conv_627

Popović M, Budinski-Simendić J, Jovičić M, Mursics J, Điporović-Momčilović M, Pavličević J, Ristić I. Izučavanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva primenom metode izokonverzije. in Hemijska industrija. 2011;65(6):717-726.
doi:10.2298/HEMIND110912088P
conv_627 .

Popović, Mlađan, Budinski-Simendić, Jaroslava, Jovičić, Mirjana, Mursics, Joszef, Điporović-Momčilović, Milanka, Pavličević, Jelena, Ristić, Ivan, "Izučavanje kinetike umrežavanja dva komercijalna urea-formaldehidna adheziva primenom metode izokonverzije" in Hemijska industrija, 65, no. 6 (2011):717-726,
https://doi.org/10.2298/HEMIND110912088P .,
conv_627 .