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undergraduate thesis
Utjecaj UV zračenja na strukturu polimera
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. urn:nbn:hr:149:043611
Bartulović, Lorena
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

Bartulović, L. (2023). Utjecaj UV zračenja na strukturu polimera (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:043611

Bartulović, Lorena. "Utjecaj UV zračenja na strukturu polimera." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:043611

Bartulović, Lorena. "Utjecaj UV zračenja na strukturu polimera." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:043611

Bartulović, L. (2023). 'Utjecaj UV zračenja na strukturu polimera', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 25 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:043611

Bartulović L. Utjecaj UV zračenja na strukturu polimera [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2023 [cited 2024 December 25] Available at: https://urn.nsk.hr/urn:nbn:hr:149:043611

L. Bartulović, "Utjecaj UV zračenja na strukturu polimera", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:149:043611

Metadata
TitleUtjecaj UV zračenja na strukturu polimera
Title (english)Influence of UV irradiation on polymer structure
AuthorLorena Bartulović
MentorZlata Hrnjak-Murgić (mentor)
Committee memberZlata Hrnjak-Murgić (predsjednik povjerenstva)
Committee memberEmi Govorčin Bajsić (član povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2023-09-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Pod utjecajem atmosferskih uvjeta, ultraljubičastog zračenja (eng. ultraviolet – UV) i topline, polimerni materijali degradiraju pri čemu dolazi do promjene njihovih svojstava kao što je na primjer povećanje krtosti i lomljivosti što za posljedicu daje nastajanje mikroplastike u okolišu. U svrhu izrade ovog rada korišteni su materijali polietilen visoke gustoće (HDPE) i polipropilen (PP) koji su izloženi atmosferskom starenju. Uzorci HDPE folija i PP folija su izloženi procesu starenja u razdoblju od 14, 28, 42 i 530 dana. Nakon tog vremenskog razdoblja, promjene koje su se dogodile uslijed procesa degradacije praćene su pomoću infracrvene spektroskopije s Fourierovom transformacijom (eng. Fourier-transform infrared spectroscopy, FTIR). Pomoću FTIR spektara identificirana je pojava razradnih skupina (karboksilne, karbonilne te oksi skupine) koje su nastale kao posljedica razgradnje polimera. Intenzitet razgradnje okarakteriziran je za određivanje karbonilnog indeksa (C.I.). Rezultati dobiveni primjenom metode infracrvene spektroskopije pokazuju da povećanjem vremena starenja dolazi do promjene strukture molekula polimera, što je vidljivo iz povećanja karbonilnog indeksa.
Abstract (english)
Under the influence of atmospheric conditions, ultraviolet (UV) radiation and heat, polymer materials undergo degradation, leading to changes in their properties such as increased brittleness and fragility, resulting in accumulation of microplastic in the environment. In this study, high-density polyethylene (HDPE) and polypropylene (PP) materials were used and were exposed to atmospheric aging. Samples of HDPE film and PP film were subjected to aging for periods of 14, 28, 42 and 530 days. After this period of time, the changes that occurred due to degradation processes were monitored using Fourier-transform infrared spectroscopy (FTIR). The FTIR spectra were utilized to identify the presence of newly formed groups (carboxyl, carbonyl and oxy groups) as a result of polymer degradation. The degree of degradation was determinated by carbonyl index (C.I.). The results of FTIR spectroscopy show that with increasing aging time, changes in the molecular structure of the polymer can be observed, which are reflected in an increased carbonyl index.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:043611
ProjectNumber: IP-2020-02-6033
Title: Mikroplastika u vodi; sudbina, ponašanje i uklanjanje
Title: Microplastics in water; fate and behavior and removal
Acronym: ReMiCRO
Leader: Ana Lončarić Božić
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Materials Science and Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2023-11-29 17:00:31