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master's thesis
Utjecaj udjela vlakana brnistre na svojstva TPU kompozita
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. urn:nbn:hr:149:701464
Pondeljak, Leonora
University of Zagreb
Faculty of Chemical Engineering and Technology

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

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Pondeljak, L. (2023). Utjecaj udjela vlakana brnistre na svojstva TPU kompozita (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:701464

Pondeljak, Leonora. "Utjecaj udjela vlakana brnistre na svojstva TPU kompozita." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:701464

Pondeljak, Leonora. "Utjecaj udjela vlakana brnistre na svojstva TPU kompozita." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:701464

Pondeljak, L. (2023). 'Utjecaj udjela vlakana brnistre na svojstva TPU kompozita', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 25 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:701464

Pondeljak L. Utjecaj udjela vlakana brnistre na svojstva TPU kompozita [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2023 [cited 2024 November 25] Available at: https://urn.nsk.hr/urn:nbn:hr:149:701464

L. Pondeljak, "Utjecaj udjela vlakana brnistre na svojstva TPU kompozita", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:149:701464

Metadata
TitleUtjecaj udjela vlakana brnistre na svojstva TPU kompozita
Title (english)The influence of the content of Spartium junceum L. fibres on the properties of TPU composites
AuthorLeonora Pondeljak
MentorEmi Govorčin Bajsić (mentor)
Committee memberEmi Govorčin Bajsić (predsjednik povjerenstva)
Committee memberMirela Leskovac (član povjerenstva)
Committee memberJasna Prlić Kardum (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2023-07-07, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Termoplastični poliuretan (TPU) polimer je koji ima izrazito dobra svojstva, kao što su mehanička svojstva, otpornost na gorenje, kemijska otpornost te dobra toplinska stabilnost. Kako bi se ta svojstva dodatno poboljšala, dodaju mu se punila koja mogu biti sintetska ili prirodna vlakna. Sintetska vlakna se, zbog nemogućnosti razgradnje, nastoje zamjeniti prirodnim vlaknima. U ovom radu, kao punilo koriste se vlakna brnistre (BRN). TPU/BRN kompoziti, kao i čisti TPU, pripremljeni su u Brabender gnjetilici s udjelom brnistre od 5; 10; 15 i 20 mas. %. Izrađeni kompoziti, kao i čiste komponente, karakterizirani su DSC, TGA i FTIR tehnikama. DSC rezultati pokazali su da povećanjem udjela vlakana brnistre u TPU/BRN kompozitima, dolazi do pomaka temperature staklastog prijelaza (Tg) na niže temperature, dok se vrijednosti temperature taljenja (Tm1 i Tm2) ne mijenjaju. Vrijednosti temperatura kristalizacije (Tc1 i Tc2) neznatno se povećavaju. TG analizom ustanovljeno je da toplinska stabilnost kompozita raste porastom udjela brnistre. FTIR analizom se zaključuje da je brnistra prisutna u TPU/BRN kompozitima i da dolazi do preklapanja apsorpcijskih vrpci brnistre i TPU-a.
Abstract (english)
Thermoplastic polyurethane (TPU) is a polymer material that has good properties, such as mechanical properties, burn resistance, chemical resistance and thermal stability. To further improve these properties the fillers which can be synthetic or natural fibers can be added to TPU. Because the synthetic fibers are difficult to decompose, they can be replaced by natural fibers. In this work Spartium junceum L. fibers (BRN) are used as a filler for TPU., The TPU/BRN composites with different Spartium junceum L. fibers content (5; 10; 15 and 20 wt. %) were prepared by melt mixing process in laboratory Brabender mixer. The neat TPU and TPU/BRN composites, were characterized by DSC, TGA and FTIR techniques. DSC results showed that the glass transition temperature (Tg) shifts to lower temperatures, while the values of the melting temperature (Tm1 and Tm2) do not change by increasing the fibers content in TPU/BRN composites. The crystallization temperature (Tc1 and Tc2) values increased slightly with fibers content. Based on the results of the TGA the thermal stability of the composite increased as the Spartium junceum L. fibers content increased. FTIR spectroscopy confirmed the localization of the Spartium junceum L. fibers in TPU.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:701464
Study programmeTitle: Materials Science and Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2023-07-07
Terms of useLicence In copyright icon
Created on2023-07-26 14:06:26