20.500.12556/RUL-176573 Raziskovanje termičnih lastnosti reciklirane plastike v primerjavi s primarnim materialom Investigation of the thermal properties of recycled plastic compared to virgin material V diplomskem delu so bile raziskane termične lastnosti reciklirane PET plastike z metodo diferenčne dinamične kalorimetrije (DSC). Analizirani so bili trije vzorci različnih izvorov (zelena plastenka Radenska, brezbarvna plastenka Jar in črna posodica Crown), primerjalno pa tudi referenčna PET-folija. Izvedene so bile meritve pri večjih in manjših masah vzorcev ter s cikličnim in šok hlajenjem. Posebna pozornost je bila namenjena določanju steklastega prehoda (T$_g$), kristaliničnosti in vplivu mase na obliko krivulj. Rezultati kažejo, da imajo vzorci različnih izvorov različne stopnje kristaliničnosti, da se steklasti prehodi bolj izraziti pri manjših masah vzorcev ter da ponovljeno gretje omogoča zanesljivejšo oceno T$_g$. Ugotovitve prispevajo k boljšemu razumevanju lastnosti recikliranega PET in so uporabne pri ocenjevanju njegove ponovne uporabnosti. In this thesis, the thermal properties of recycled PET plastic were analyzed using differential scanning calorimetry (DSC). Three samples of different origin were analyzed (a green Radenska bottle, a colorless Jar bottle, and a black Crown protein container), as well as a PET reference film for comparison. The measurements were performed with both larger and smaller sample masses, using cyclic and shock cooling methods. Particular attention was paid to the determination of the glass transition temperature (T$_g$), the crystallinity, and the influence of the sample mass on the shape of the DSC curves. The results show that samples from different sources have different degrees of crystallinity, that glass transitions are more pronounced with smaller sample masses, and that repeated heating allows a more reliable estimation of T$_g$. These results contribute to a better understanding of the properties of recycled PET and are useful for evaluating its potential for reuse. PET DSC T$_g$ kristaliničnost ciklična metoda šok hlajenje PET DSC T$_g$ crystallinity cyclic method shock cooling true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-12-04 10:46:22 2025-12-04 10:46:31 2025-12-22 04:06:30 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 25635 259992579 Savkov_Aleksej_-_Raziskovanje_termicnih_lastnosti_reciklirane_plastike_v_primerjavi_s_primarnim_.pdf Savkov_Aleksej_-_Raziskovanje_termicnih_lastnosti_reciklirane_plastike_v_primerjavi_s_primarnim_.pdf 1 B15FE9FC91DCED9F49838D7EE5985CD1 73663657b531f54d322c95a8930433bc91adda65b2f2059c58b88f78c24c7c3c bd58c4c5-d0f5-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=222986 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0