ПЛАТОН репозиторијум: Recent submissions
Now showing items 441-460 of 1190
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Correlation between methods of activation of montmorilonite K10 and formaldehyde content in urea-formaldehyde composites
(Faculty of Management Herceg Novi, 2022-05-26)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 ... -
Irradiation resistance of elastomeric composites based on NR/CSM blend and waste rubber powder
(RAD Centre, Niš, Serbia, 2021-06-14)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) ... -
The effect of UV-irradiation on the thermal stability of modified urea-formaldehyde resins with thermally activated montmorillonite
(RAD Centre, 2021-06-14)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 ... -
АСПЕКТИ БИОМЕДИЦИНСКИ ПОТПОМОГНУТЕ ОПЛОДЊЕ - Пракса Европског суда за људска права ASPECTS BIOMEDICAL ASSISTED PROCREATION – The European court of human rights
(Удружење правника Србије, 2018)The purpose of this paper is to assess the role of the European Court of Human Rights (ECtHR) in the field of biomedically assisted procreation, as a part of reproductive rights and freedoms. The basis of the analysis ... -
The influence of the type of activation of the montmorillonite of hydrolytic stability of the urea-formaldehide nanocomposite
(University of Novi Sad, Faculty of Technology Novi Sad, 2019-10-10)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 ... -
The effect of UV irradiation on hydrolytic stability of urea-formaldehyde resins filled with thermally modified montmorillonite
(RAD Centre, Niš, Serbia, 2019-06-10)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 ... -
The influence of modification and the particle size of the montmorillonite on the hydrolytic stability of urea-formaldehyde composite
(Materials Research Society of Serbia, 2019-09-02)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, ... -
Determination of glass transition temperature and irradiation resistance of elastomeric materials based on chlorinated natural rubber
(RAD Association, 2018-06-18)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. ... -
Effect of silica on the properties of elastomeric materials based on NR/BR/SBR ternary rubber blend
(University of Banja Luka, Faculty of Technology, Banja Luka, 2018-11-02)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 ... -
KORELACIJA IZMEĐU NAČINA AKTIVIRANJA MONTMORILONITA K10 I SADRŽAJA FORMALDEHIDA U UREA-FORMALDEHIDNIM KOMPOZITIMA
(Faculty of Management Herceg Novi, 2022-05-26)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 ... -
Domestic material made by calcification of modified UF resins with incorporated Fe-particles-a sensitive platform for electroanalytical quantification of gallic acid.
(University "Union Nikola Tesla", Belgrad, Serbia, 2021-09-24)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 ... -
The influence of the modification of the montmorillonite KSF and K10 on the hydrolytic stability of UF composites
(2021-09-24)In this work, the hydrolytic stability of composites based on the urea-formaldehyde resin (UF) and montmorillonite-MMT (K1 0 and KSF) as a formaldehyde (FA) scavenger was investigated. K10 and KSF were activated by sodium ... -
The vulcanization properties of hybrid elastomeric materials based on waste rubber powder
(University of Belgrade, Technical Faculty in Bor, 2019-06-18)Elastomeric materials have viscoelastic properties and can be designed for numerous applications, tires production, vibration isolation and damping. These properties can be tailored for a wide temperature range and in ... -
NR/CSM/Wood flour polymer composites in railway industry
(Faculty of Mechanical Engineering Nis, 2018-10-11)Wood flour composites can be optimized to obtain new materials for a part of the railroad infrastructure. Curing, mechanical and morphological characteristics of carbon blackand silica-filled natural ntbber (NR)/chlorosulphonated ... -
Effect of silica on the properties of elastomeric materials based on NR/BR/SBR ternary rubber blend
(University in Banjaluka, Faculty of Technology, 2018-11-02)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 ... -
Mathematical Approach for System Repair Rate Analysis Used in Maintenance Decision Making
(MDPI, 2021-05-20)Reliability, the number of spare parts and repair time have a great impact on system availability. In this paper, we observed a repairable system comprised of several components. The aim was to determine the repair rate ... -
MAXIMUM RELIABILITY K-CENTER LOCATION PROBLEM
(Union of Mathematicians of Macedonia - ARMAGANKA, 2020-10-31)This paper presents an approach for solving the maximum reliability k-center location problem. We are modifying the well-known p-center problem in order to determine the location of the observed objects and maximize the ... -
A stochastic model for estimation of repair rate for system operating under performance based logistics
(Polish Maintanace Society, 2018-09-01)Performance Based Logistics (PBL) concept has an aim to improve the system availability and it has been extensively researched in the recent years. These researches showed that inventory level does not impact system ... -
Neodrživost prakse urbanističkog planiranja u Srbiji – primer izmena i dopuna planova generalne regulacije.
(Asocijacija prostornih planera Srbije, Univerzitet u Beogradu – Geografski fakultet, 2018-04-10)Srbija nakon 2000. godine, urbzano prolazi kroz proces post-socijalističke transformacije. Ovaj proces prati transformacija socijalističke privrede, odlikovane snažnom regulatornom ulogom države, ka kapitalističkoj privredi, ... -
Pritisak na rečne obale i njihova transformacija usled izgradnje vikendica i sojenica: slučaj Savskog nasipa (Beograd).
(Asocijacija prostornih planera Srbije, Univerzitet u Beogradu- Geografski fakultet, 2020-11-10)Na prostorima neposredno uz reke, zbog hidroloških, ekoloških i bezbednosnih razloga, kao i zakonskih odredbi, načela i principa planiranja, najčešće nije dozvoljena gradnja. Planska dokumenta ove prostore uglavnom definišu ...