In this paper, the influence of thermoplastic segmented polyurethanes on the curing kinetics of epoxy based hybrid materials was assessed. Samples were prepared with diglycidil ester bisphenole A epoxy resin and different content (10, 15 and 20 wt. %) of thermoplastic segmented polyurethanes with different content of hard segments (20, 25 and...

By Vesna Teofilović, Mirjana Jovičić, Jelena Pavličević, Oskar Bera, Snežana Sinadinović-Fišer, Milena Špírková, Ayse Zehra Aroguz

 After the turbine oil life cycle has been completed, it is necessary to replace it. The new generation of turbine oils is formulated with Group II and/or III base oils and a package of ashless additives. Such oils are often incompatible with conventional types of turbine oil. The new oil in the system also has the ability to dissolve residual...

By Mirko Petković, Valentina Petković, Tatjana Mirković, Tatjana Botić, Pero Dugić

 In this work were synthesized hybrid materials based on aliphatic polyurethanes and small amounts of titanium dioxide nanoparticles (0.5; 2.0 and 3.0 wt.%). From an environmental point of view, this synthesized hybrid materials are significant engineering materials because the products of their thermal degradation are significantly less toxic...

By Jelena Pavličević, Dejan Kojić, Milena Špírková, Mirjana Jovičić, Bojana Ikonić, Vladan Mićić, Jaroslava Budinski-Simendić

 When designing machines that contain dynamic components, it is necessary to consider the tribological properties of the materials used for the functional parts of these components. The movement itself during the operation of the machines has a mechanical impact on these parts, which may result in the performance of the mechanism being affecte...

By Michaela Dilyova, Michal Hatala, Svetlana Radchenko, Frantisek Botko, Zuzana Mitalova

 Aerogels with large surface area, are very light related to the filling of pores with air (99%). Due to these features scientific studies on aerogels have increased at great speed. Aerogels are obtained using many materials as inorganic substances like silica as well as cellulose as biodegradable organic polymers. Bacterial cellulose is eco-f...

By Canan Karakus, Ayse Zehra Aroguz

 The continuous increasing of requirements for product quality leads to increased flaw control and evaluation. One of the inspected parts of the product is a welded joint. The flaws should be eliminated as far as possible to avoid the failure or destruction of the product. In the field of weld inspection, there is the most used the non-destruc...

By Dusan Sutak, Michal Hatala, Dusan Mital, Igor Olexa, Enes Sukic

 The paper describes the implementation of an Elastisearch, Logstash and Kibana (ELK) stack to process, analyze and display of IoT data originating from several types of sensors. The prepared Elasticsearch platform collects and integrates real data generated by various sensors for further processing and publishing the desired information. Stor...

By Nebojša Kuduz, Saša Salapura

 Flooding is natural disaster which is very frequent and most costly and unfortunately, we were witnessed flood in region in previous years. This paper will describe the usage of Internet of Things (IoT) technology to monitor river behavior in order to prevent or mitigate the recurrence of disasters. The paper also describes development and de...

By Saša Salapura, Nebojša Kuduz

 Epoxidized vegetable oils have seen increasing application diversity in chemical and polymer industry. They are mainly used as stabilizer and plasticizer for polyvinyl chloride (PVC). However, they are also promising intermediates for the production of other vegetable oil derivatives. Vegetable oils are epoxidized in the industry with in situ...

By Olga Govedarica, Milovan Janković, Snežana Sinadinović-Fišer, Vesna Teofilović, Mirjana Jovičić, Ayse Zehra Aroguz

 The heat transfer operation is extremely important in various technologies, especially in the rubber industry for crosslinking and for all the steps in the process of obtaining products from elastomeric materials. The speed at which the heat can be transferred to the rubber compound or taken away from it affects the design of the process equi...

By Vladan Mićić, Jaroslava Budinski-Simendić, Branko Pejović, Jelena Pavličević, Mitar Perušić, Ljiljana Tanasić, Duško Kostić