20.500.12556/RUL-184235 Uporaba analize glavnih komponent pri razlagi rezultatov DSC analize recikliranega polietilentereftalata The Use of Principal Component Analysis to Interpret the Results of DSC Analysis of Recycled Polyethylene Terephthalate V diplomskem delu sem raziskoval termične lastnosti mehansko recikliranega polietilentereftalata (rPET) z metodo diferenčne dinamične kalorimetrije (DSC). Analiziranih je bilo 58 vzorcev rPET iz podjetja rPET InWaste, s.r.o., Češka. Meritve so bile izvedene z diferenčnim dinamičnim kalorimetrom Mettler Toledo DSC 5+ po cikličnem temperaturnem programu gretje, hlajenje in ponovno gretje. Na podlagi DSC meritev so bile določene temperature in entalpije kristalizacije, hladne kristalizacije ter tališča. Pridobljeni podatki so bili statistično obdelani s Pearsonovo korelacijsko analizo in analizo glavnih komponent (PCA) v programu OriginPro. Rezultati so pokazali povezave med posameznimi termičnimi parametri ter pokazali združevanje parametrov kristalizacije in taljenja v značilne skupine. Najizrazitejše združevanje vzorcev je bilo opazno pri stopnji degradacije. Razporeditev vzorcev z najvišjo stopnjo degradacije je povezana predvsem s talilno entalpijo, kristalizacijsko entalpijo ter temperaturo začetka in vrha kristalizacije. In this thesis, the thermal properties of mechanically recycled polyethylene terephthalate (rPET) were investigated using Differential Scanning Calorimetry (DSC). A total of 58 rPET samples obtained from rPET InWaste, s.r.o., Czech Republic, were analyzed. Measurements were performed with a Mettler Toledo DSC 5+ calorimeter following a cyclic temperature program of heating, cooling, and reheating. Temperatures and enthalpies of crystallization, cold crystallization, and melting were determined from the DSC measurements. The data were statistically processed using Pearson correlation analysis and Principal Component Analysis (PCA) in OriginPro. The results revealed correlations between individual thermal parameters and showed that crystallization and melting parameters clustered into distinct groups. The most pronounced clustering of samples was observed by degree of degradation. The distribution of samples with the highest degree of degradation is primarily related to the enthalpy of fusion, enthalpy of crystallization, and the onset and peak temperatures of crystallization. recikliran polietilen tereftalat diferenčna dinamična kalorimetrija PCA analiza recycled polyethylene terephthalate differential scanning calorimetry PCA analysis true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-07-02 09:20:02 2026-07-02 09:20:08 2026-07-30 14:35:27 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 26130 286490883 Gliha_Samo_-_Uporaba_analize_glavnih_komponent_pri_razlagi_rezultatov_DSC_analize_recikliranega_.pdf Gliha_Samo_-_Uporaba_analize_glavnih_komponent_pri_razlagi_rezultatov_DSC_analize_recikliranega_.pdf 1 05B0D0279598262161FE80B30C070B1D b1ac82e166cde0c1f9afc0d77f4c0bdb1a755cbc3a261a18e419a525b5419b4f 59ef1170-75e6-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236844 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0