20.500.12556/RUL-29000 Vpliv stopnje kondenzacije MUF smol na lastnosti lepilnih spojev Influence of MUF resin condensation degree on adhesive bond properties Melamin-urea-formaldehidne smole se zaradi svojih odličnih lastnosti, predvsem odpornosti na vlago in vodo ter brezbarvnosti lepilnega spoja veliko uporabljajo v lesni industriji. Kljub dejstvu, da je osnovna reakcija med melaminom in formaldehidom znana že dobrih sedemdeset let, so pogoji sinteze in molarna razmerja še vedno predmet raziskav. Različna molarna razmerja vstopnih surovin in različni pogoji sinteze močno vplivajo na lastnosti smole,njeno stabilnost in obnašanje v končni uporabi. V raziskavi smo osnovni smoli spremenili molarna razmerja in pogoje sinteze in analizirali vplive posameznih sprememb. Ker se reakcija kondenzacije z zaključkom sinteze ne konča,temveč šele upočasni,smo analizirali tudi značilnosti t.i. postarane smole. Melamine-urea-formaldehyde resins with their excellent properties, in particular resistance to humidity and water and colourless adhesive bond, are widely used in the wood industry. In spite of the fact that the basic reaction between melamine and formaldehyde has been known for over seventy years, the conditions of synthesis and molar ratios continue to be a matter of research. Different molar ratios of input raw materials and different conditions of synthesis have a major impact on the properties of the resin, its stability and end use behaviour. In this research project, molar ratios and conditions of synthesis of the basic resin were modifed, and the impact of each modification was analysed. As condensation reaction does not end once the synthesis is completed but merely decreases,we also analysed the properties of the so-called aged resin. MUF smola sinteza kondenzacija lepilni sloji bukov furnir true false false Slovenski jezik Neznan jezik Delo ni kategorizirano 2014-07-11 15:15:40 2014-07-11 15:15:40 2022-08-01 10:29:21 0000-00-00 00:00:00 2001 0 0 Str. 139-155 Št. 66 2001 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*824.831 0351-3114 836489 RAZ_Gornik_Bucar_Dominika_2001.pdf RAZ_Gornik_Bucar_Dominika_2001.pdf 1 71571B529B9C3F89C742F5B9302B37F0 945dfeb46373d799cff9b756015cec33e430e1b00c8134cc800ca99f255e0518 d69cb28c-6197-11ec-abdb-00155dcfd717 20.500.12556/rul/c49ff967-8b2e-416d-a2a0-d04cd71113a8 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152290 Biotehniška fakulteta 0 0 0