1th International Conference „Conference on advances in science and technology“ COAST 2022
(Faculty of Management Herceg Novi)
• 26 May 2022
Ristić, Mirjana • Samaržija-Jovanović, Suzana • Jovanović, Vojislav • Petković, Branka • Kostić, Marija • Jovanović, Tijana • Marinović-Cincović, Milena
In this paper, the methods of activation of montmorillonite (MMT) K10 with the content of formaldehyde (FA) in urea-formaldehyde (UF) composites are compared. MMT K10 samples were activated in two ways: thermally(physical activation) and with sulfuric acid (chemical activation). In situ synthesis of UF composites with unmodified and activated K10 under the same conditions was performed. A total of three UF composites were synthesized: reference UF composite containing unmodified MMT UF/K10, UF c ...
Ninth international conference on radiation in various fields of research (RAD 2021)
(RAD Centre, Niš, Serbia)
• 14 Jun 2021
Marković, Gordana • Marinović-Cincović, Milena • Jovanović, Vojislav • Samaržija-Jovanović, Suzana • Teofilović, Vesna • Marković, Marija • Pavličević, Jelena • Budinski-Simendić, Jaroslava
Effect of waste rubber particles (WTR) size on elastomers based on natural rubber and chlorosulfonated polyethylene rubber (NR/CSM= 50:50) was studied. Two types of WTR with different particle size (150–250 μm and 450–600μm) were used. The content of carbon black was constant but the content of WTR was varied from 0 to 40 phr. The compounds were prepared by two-roll mill. The crosslinked materials were obtained in hydraulic press. The irradiation of prepared composite materials was carried out u ...
Ninth international conference on radiation in various fields of research (RAD 2021)
(RAD Centre)
• 14 Jun 2021
Jovanović, Vojislav • Samaržija-Jovanović, Suzana • Petković, Branka • Jovanović, Tijana • Marković, Gordana • Marinović-Cincović, Milena • Teofilović, Vesna
The montmorillonite as a 2:1 smectite type clay has two tetrahedral sheets of silica sandwiching the alumina octahedral sheet. The particles of this mineral are plate-shaped with the thickness of 0.96 nm and an average diameter about 1 μm. This type of clay (K10) is using to improve the characteristics of different materials in the fields of catalysis, food additives, polymers, sorbents, etc. In this study thermally activated montmorillonite (DK10) was used because the thermal treatment alters i ...
1st International conference on Advanced Production and Procesing-ICAPP 2019
(University of Novi Sad, Faculty of Technology Novi Sad)
• 10 Oct 2019
Čanaćević, Milena • Kostić, Marija • Samaržija-Jovanović, Suzana • Jovanović, Vojislav • Petković, Branka • Marković, Gordana • Budinski-Simendić, Jaroslava
In this work the hydrolytic stability of nano-composites based on urea-formaldehyde resin (UF) and montmorillonite (K10) as formaldehyde scavenger was investigated. K10 was activated by sulfuric acid (H2SO4) with and without mechanical mixing. The degree activation was determined using specific surface measurement (Sir's method) and the cation-exchange capacity (CEC) measurement. The hydrolytic stability of modified UF composites was determined by the mass losses estimation and via free formalde ...
Seventh international conference on radiation in various fields of research (RAD 2019)
(RAD Centre, Niš, Serbia)
• 10 Jun 2019
Samaržija-Jovanović, Suzana • Jovanović, Vojislav • Petković, Branka • Slaviša, Jovanović • Marković, Gordana • Marinović-Cincović, Milena • Budinski-Simendić, Jaroslava
The hydrolytic stability of organic-inorganic nano-composites prepared by a two-stage
polymerization of urea-formaldehyde resin (UF) filled with thermally activated montmorillonite (MMT) has been assessed before and after UV irradiation. The physical modification of MMT powder (type K10 with surface area 220 – 270 m2/g) was carried out by thermal treatment. The activated samples were designated as TA-K10 and the inactivated as NA-K10. The two types of ureaformaldehyde–MMT composites (UF/TA-K10 ...
Twenty‐first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019
(Materials Research Society of Serbia)
• 02 Sep 2019
Samaržija-Jovanović, Suzana • Petković, Branka • Jovanović, Tijana • Jovanović, Vojislav • Marković, Gordana • Marinović-Cincović, Milena • Budinski-Simendić, Jaroslava
Urea–formaldehyde (UF) resin adhesive is a polymeric condensation product of formaldehyde with urea and is considered as one of the most important wood adhesives. In spite of some advantages such as lower cost, fast curing, good performance in the panel, water solubility and being colorless, UF resin adhesives also possess a critical disadvantage: formaldehyde (FA) emission from the panels. Exposure to FA may occur by breathing contaminated indoor air, tobacco smoke, or ambient urban air. Furthe ...
Sixth international conference on radiation in various fields of research (RAD 2018)
(RAD Association)
• 18 Jun 2018
Budinski-Simendić, Jaroslava • Marinović-Cincović, Milena • Kojić, Dejan • Marković, Gordana • Pavličević, Jelena • Aroguz, Ayse • Samaržija-Jovanović, Suzana
Synthetic rubbers have different surface structures but benefit from chlorination. In many cases their tensile strength and extensibility is lower than natural rubber and for that reason more easily mechanically damaged. Chlorination reduces the coefficient of surface friction and handling characteristics. Residual free sulfur bloom during long-term storage of elastomeric products can also be diminished. Chlorinated natural rubber (CNR) as network precursor for elastomeric materials finds applic ...
XII Conference of Chemists, Technologists and Environmentalists of Republic of Srpska
(University of Banja Luka, Faculty of Technology, Banja Luka)
• 02 Nov 2018
Jovanović, Slaviša • Jovanović, Vojislav • Marković, Gordana • Marinović-Cincović, Milena • Gligorić, Miladin • Vukić, Nevena • Samaržija-Jovanović, Suzana • Budinski-Simendić, Jaroslava
The effects of pyrogeneous silica on the mechanical properties of elastomeric
materials based on natural rubber (NR), polybutadiene rubber (PB) and styrene butadiene
rubber (SBR) are reported. For sample preparations the content of
network precursor was constant (25:25:50), but the content of filler was varied (0,
40, 60, 80, 100 phr). Curing behavior was assessed using oscillating disc
rheometer. Results indicated that the minimum torque and maximum torque
increase with increasing filler ...
1th International Conference „Conference on advances in science and technology“ COAST 2022
(Faculty of Management Herceg Novi)
• 26 May 2022
Ristić, Mirjana • Samaržija-Jovanović, Suzana • Jovanović, Vojislav • Petković, Branka • Kostić, Marija • Jovanović, Tijana • Marinović-Cincović, Milena
U ovom radu je izvršeno poređenje načina aktiviranja montmorilonita (MMT) K10 sa sadržajem formaldehida (FA) u urea-formaldehidnim (UF) kompozitima. Uzorci MMT-a K10 su aktivirani na dva načina: termički i pomoću sumporne kiseline. Nakon aktiviranja MMT-a izvršena je in situ sinteza UF kompozita pod istim uslovima. Sintetisano je ukupno tri UF kompozita i to: referentni UF kompozit koji sadrži nemodifikovan MMT (UF/K10), UF kompozit koji sadrži termički aktiviran MMT (UF/K10) i UF kompozit koji ...
The First International conference on Sustainable Environment and Technologies „Creating sustainable commUNiTy“
(University "Union Nikola Tesla", Belgrad, Serbia)
• 24 Sep 2021
Petković, Branka • Kostić, Marija • Samaržija-Jovanović, Suzana • Laban, Bojana • Veljović, Djordje • Stanković, Dalibor
In this work, we present domestic high performance electrode material
prepared by thermolysis of in situ synthesized urea-formaldehyde (UF)
resins modified with Fe(III) nitrate. For comparison, material produced by
thermolysis of physical mixture of synthesized UF resins and Fe(lll) salt was
also prepared, and produced materials were electrochemically characterized by
cyclic voltammetry. The obtained results have shown that in situ synthesized
Fe modified UF material (SynFe/UF-TP) prepared ...
