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Title:Primerjava lastnosti konvencionalnih in recikliranih poliestrnih vlaken : diplomsko delo
Authors:ID Ribič, Sonja (Author)
ID Strnad, Simona (Mentor) More about this mentor... New window
Files:.pdf VS_Ribic_Sonja_2021.pdf (2,50 MB)
MD5: 4F1CE2A55CD6010A8D895357EF9437DA
PID: 20.500.12556/dkum/d3af4737-3212-46a5-a368-b8c6f10bc617
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Recikliranje je ključnega pomena za učinkovito ravnanje s plastiko ob koncu življenjske dobe. Eden od prvih zelo uspešnih pristopov v tej smeri je bilo recikliranje polietilen tereftalata (PET), iz katerega so po večini izdelana tekstilna vlakna in plastenke. Vendar pa sam proces recikliranja, ponovnega taljenja in ekstruzije polimera zaradi termo mehanskih vplivov med taljenjem in hidrolitske razgradnje med procesi ekstruzije, vpliva na strukturne spremembe polimera na molekulskem in nadmolekulskem nivoju, kar vodi do poslabšanja mehanskih in kemičnih lastnosti izdelkov iz recikliranega polietilen tereftalata (rPET). Namen diplomske naloge je bil ugotoviti razlike v ključnih kemičnih in fizikalnih lastnostih med konvencionalnimi (PET) in recikliranimi (rPET) vlakni iz polietilen tereftalata. V ta namen so bile izvedene mikroskopske analize in merjenje debeline vlaken, določanje finosti in pretržne sile in raztezka, določanje navzemanja vlage pri konvencionalnih klimatskih pogojih in navzemanja in zadrževanja vode, IR spektroskopija ter termične analize (TGA in DSC). Na osnovi rezultatov je bilo ugotovljeno, da so ob enaki kemični sestavi imela rPET vlakna višji titer, višji pretržni raztezek, večjo sposobnost navzemanja vlage, a so po centrifugiranju zadržala manj vode kot konvencionalna PET vlakna. Večina teh lastnosti najverjetneje izhaja iz razlik v nadmolekulski strukturi, saj so imela rPET vlakna za okrog 27 % nižjo stopnjo kristalinosti v primerjavi s konvencionalnim PET vzorcem.
Keywords:vlakna, polietilen tereftalat, PET, reciklirana polietilen tereftalatna vlakna, kemične in fizikalne lastnosti vlaken
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[S. Ribič]
Year of publishing:2021
Number of pages:X, 52 str.
PID:20.500.12556/DKUM-79696 New window
UDC:677.014(043.2)
COBISS.SI-ID:84589315 New window
Publication date in DKUM:21.09.2021
Views:1090
Downloads:91
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
:
RIBIČ, Sonja, 2021, Primerjava lastnosti konvencionalnih in recikliranih poliestrnih vlaken : diplomsko delo [online]. Bachelor’s thesis. Maribor : S. Ribič. [Accessed 7 January 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=79696
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:11.08.2021

Secondary language

Language:English
Title:Comparison of conventional and recycled polyester fibers' properties
Abstract:Recycling is crucial for efficient end-of-life plastic management. One of the first successful approaches in this direction was the recycling of polyethylene terephthalate (PET), from which textile fibers and bottles are mostly made. However, the process of recycling, re-melting, and extrusion of the polymer due to thermo-mechanical influences during melting and hydrolytic degradation during extrusion processes affects the structural changes of the polymer at the molecular and supramolecular levels. This leads to the deterioration of mechanical and chemical properties of recycled polyethylene terephthalate products. (rPET). The purpose of this thesis was to determine the differences in key chemical and physical properties between conventional (PET) and recycled (rPET) polyethylene terephthalate fibers. For this purpose, microscopic analysis and measurement of fiber thickness, determination of fineness and tensile strength and elongation, determination of moisture uptake under conventional climatic conditions and water uptake and retention, IR spectroscopy, and thermal analyzes (TGA and DSC) were performed. Based on the results, it was found that with the same chemical composition, rPET fibers had a higher titer, higher tensile elongation, greater ability to absorb moisture, but retained less water after centrifugation than conventional PET fibers. Most of these properties most likely stem from differences in supramolecular structure, as rPET fibers had about 27 % lower crystallinity rates compared to the conventional PET sample.
Keywords:fibers, polyethylene terephthalate, PET, recycled polyethylene terephthalate fibers, chemical and physical properties of fibers


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