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Polimery
PL Dotychczasowe sposoby syntezy oligoeteroli z pierścieniami azacyklicznymi polegają najczęściej na reakcjach melaminy (MEL) lub kwasu izocyjanurowego z oksiranami. Wadą tego sposobu syntezy jest brak dobrych rozpuszczalników melaminy i kwasu izocyjanurowego, w których można by prowadzić reakcje z oks[...]
EN A new method of preparation of oligoetherols containing azacyclic rings from isocyanuric acid (IA), uric acid (UA) or melamine (MEL) with an excess of glycidol (GL) and oxiranes without using solvent is presented. The method can be extended on synthesis of oligoetherols with other azacyclic compound[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The purpose of this paper is to identify the influence of loading history and the processes of material degradation on the crack initiation and on durability under thermo-mechanical fatigue conditions. Design/methodology/approach: Based on the operation data, the conditions of laboratory e[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The aim of the work was evaluation of the corrosion resistance of the commercial metallic orthodontic wires from different manufacturers in simulated intra-oral environment. Design/methodology/approach: Corrosion resistance tests were carried out in artificial saliva at the temperature 37 ±[...]
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