20.500.12556/DKUM-55667 TERMOMEHANSKA ANALIZA POLIKARBONATA, POLIVINIL KLORIDA IN POLIMETIL METAKRILATA THERMOMECHANICAL ANALYSIS OF OLYCARBONATE, POLYVINYL CHLORIDE AND POLYMETHYL METHACRYLATE V okviru magistrske naloge smo izvedli raziskavo merjenja termomehanskih lastnosti polimerov, in sicer, polikarbonata, polimetil metakrilata in polivinil klorida. Poznavanje termomehanskih lastnosti materiala nam je v veliko pomoč pri ugotavljanju njegovih karakteristik in kasnejših možnosti uporabe. S termomehansko analizo (TMA) smo določili temperature steklastega prehoda in koeficiente linearnega temperaturnega raztezka vseh treh materialov. Pri testiranju smo uporabljali različne sile obremenitve vzorca. Za primerjavo smo izmerili temperaturo steklastega prehoda z diferenčno dinamično kalorimetrijo (DSC). Za pridobljene vrednosti smo poskušali poiskati teoretično razlago. Izmerjeni temperaturi steklastega prehoda polikarbonata in polimetil metakrilata se dobro ujemata z literaturnimi vrednostmi, medtem ko so pri polivinil kloridu odstopanja od literaturnih vrednosti nekoliko večja. Odstopanja smo pripisali nenatančnim podatkom o sestavi materiala. Dobljene vrednosti koeficientov linearnega temperaturnega raztezka se ne ujemajo z literaturnimi vrednostmi, kar nakazuje, da bi morali meritve izvesti z drugačno sondo. In the framework of this master’s thesis we conducted a research on measuring thermomechanical properties of polymers, that is polycarbonate, polymethyl methacrylate and polyvinyl chloride. Knowing thermomechanical properties of a material is of great help when determining its characteristics and consequently its possible applications. With help of thermomechanical analysis (TMA) we determined glass transition temperatures and linear thermal expansion coefficients for all of the three above mentioned materials. While testing we applied different forces on samples. For comparison of determined glass transition temperatures, differential scanning calorimetry (DSC) was used. Glass transition temperatures of polycarbonate and polymethyl methacrylate are in good agreement with values found in the literature, while in the case of polyvinyl chloride we observed a deviation from those values. We believe that the reason for this deviation is unknown exact composition of the tested material. Linear thermal expansion coefficients do not correspond to literature values, which indicates that measurements should be done using a different type of measuring probe. Polikarbonat polimetil metakrilat polivinil klorid temperatura steklastega prehoda TMA DSC. Polycarbonate polymethyl methacrylate polyvinyl chloride glass transition point TMA DSC. true true false [M. Hotko] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2015-12-10 14:10:44 2016-01-06 12:38:33 2022-06-09 03:09:54 2021-05-15 03:21:27 2015 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 678.743.2(043.2) 19444246 URN:SI:UM:DK:8DZIQE8D MAG_Hotko_Martina_2015.pdf MAG_Hotko_Martina_2015.pdf 1 3D31EBC9331318AA822AEB6C8891F574 0b2e0375c89e68b71d33abfc455d2b4ccabda9b8aa6a949217809ae66d1dcd2e d5759b2d-7c0b-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=83672 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0