Uporaba analize glavnih komponent pri razlagi rezultatov DSC analize recikliranega polietilentereftalata

Gliha, Samo (author), Čelan Korošin, Nataša (mentor)

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.

• Language: Slovenian
• Keywords: recikliran polietilen tereftalat, diferenčna dinamična kalorimetrija, PCA analiza
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2026
• PID: 20.500.12556/RUL-184235
• COBISS.SI-ID: 286490883
• Publication date in RUL: 02.07.2026

Secondary language

• Language: English
• Title: The Use of Principal Component Analysis to Interpret the Results of DSC Analysis of Recycled Polyethylene Terephthalate

Abstract

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.

• Keywords: recycled polyethylene terephthalate, differential scanning calorimetry, PCA analysis