prikaz prve stranice dokumenta Utjecaj termooksidativnog starenja na PE i PET mikroplastiku
Embargo period 2025-01-06
undergraduate thesis
Utjecaj termooksidativnog starenja na PE i PET mikroplastiku
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. urn:nbn:hr:149:128889
Prusac, Bruna
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Prusac, B. (2023). Utjecaj termooksidativnog starenja na PE i PET mikroplastiku (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:128889

Prusac, Bruna. "Utjecaj termooksidativnog starenja na PE i PET mikroplastiku." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:128889

Prusac, Bruna. "Utjecaj termooksidativnog starenja na PE i PET mikroplastiku." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:128889

Prusac, B. (2023). 'Utjecaj termooksidativnog starenja na PE i PET mikroplastiku', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:128889

Prusac B. Utjecaj termooksidativnog starenja na PE i PET mikroplastiku [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2023 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:128889

B. Prusac, "Utjecaj termooksidativnog starenja na PE i PET mikroplastiku", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:149:128889

Metadata
TitleUtjecaj termooksidativnog starenja na PE i PET mikroplastiku
Title (english)Effect of thermooxidative ageing on PET and PE microplastics
AuthorBruna Prusac
MentorMarin Kovačić (mentor)
Committee memberAna Lončarić Božić (predsjednik povjerenstva)
Committee memberIrena Ivanišević (član povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2023-09-19, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Velik porast potražnje za plastičnim proizvodima u posljednjim desetljećima doveo je do znatnih razmjera onečišćenja okoliša plastikom. Različitim procesima starenja i mehaničke degradacije plastika se postupno usitnjava na sitnije dijelove (<5 mm) i nastaje mikroplastika koja se smatra jednim od prioritetnih onečišćivala današnjice. Mikroplastika negativno utječe na sve sastavnice okoliša, a može imati i znatne posljedice na ljudsko zdravlje. U ovom radu polimeri poli(etilen-tereftalat) (PET) i polietilen visoke gustoće (HDPE), toplinski su stareni u laboratorijskoj peći iznad temperature taljenja. Uzorci polimera potom su usitnjeni do veličine mikroplastike te karakterizirani pomoću infracrvenog spektrofotometra s Fourierovom transformacijom signala koji koristi metodu atenuirane totalne reflektometrije (ATR-FTIR) i diferencijalnog pretražnog kalorimetra (DSC). Kod HDPE-a nisu vidljive značajne promjene između nestarenih i starenih uzoraka, zbog nedovoljno visoke temperature zagrijavanja koja je potrebna za inicijaciju toplinske degradacije. U starenim uzorcima PET-a vidljive su promjene u boji te dolazi do pogoršanja pojedinih svojstava poput temperature taljenja (Tm), temperature staklastog prijelaza (Tg), postotka kristalnosti (χ), i tako dalje. Iako su u PET uzorcima neke promjene vidljive, svejedno temperatura pri kojoj smo starili materijal nije dovoljna za neke značajnije promjene.
Abstract (english)
The high demand for plastic products in the last several decades resulted in significant environmental contamination with plastics. Through various aging processes, and mechanical degradation, plastics breaks down into ever smaller particles (< 5 mm) and forms microplastics, which are considered one of today's priority pollutants. Microplastics have negative effects on all components of the environment and can also have significant consequences on human health. In this study, polyethylene terephthalate (PET) and high-density polyethylene plastics were thermally aged at the melting temperatures of the polymers. Pristine and aged polymers were grind to microplastic size and then characterized by Fourier transform infrared spectroscopy (ATR-FTIR) and differential scanning calorimetry (DSC). For HDPE, no significant changes were observed between pristine and aged samples, indicating that the polymer was not aged at a sufficiently high temperature to initiate thermal degradation within the material. Aged PET samples showed visible colour changes as well as a decrease in certain values such as melting temperature (Tm), glass transition temperature (Tg), and crystallinity percentage (χ). Although some changes can be seen in the PET samples, the aging temperature of the material was not sufficient to cause major changes.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:128889
Study programmeTitle: Environmental Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva)
Type of resourceText
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2025-01-06
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Created on2023-11-28 13:39:23