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undergraduate thesis
Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida)
završni rad
2022. urn:nbn:hr:167:524944
Duktaj, Mirna
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Duktaj, M. (2022). Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:524944

Duktaj, Mirna. "Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:167:524944

Duktaj, Mirna. "Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:167:524944

Duktaj, M. (2022). 'Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 30 October 2024, https://urn.nsk.hr/urn:nbn:hr:167:524944

Duktaj M. Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2022 [cited 2024 October 30] Available at: https://urn.nsk.hr/urn:nbn:hr:167:524944

M. Duktaj, "Utjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:167:524944

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Metadata
TitleUtjecaj magnezijevog alginata na strukturi i toplinska svojstva poli(etilen-oksida) : završni rad
Title (english)The influence of magnesium alginate on the structure and thermal properties of poly(ethylene oxide) : bachelor thesis
AuthorMirna Duktaj
MentorSanja Perinović Jozić (mentor)
Committee memberNataša Stipanelov-Vrandečić (predsjednik povjerenstva)
Committee memberNives Vladislavić (član povjerenstva)
Committee memberSanja Perinović Jozić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2022-09-26, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Modifikacija svojstava poli(etilen-oksida) (PEO) provedena je magnezijevim alginatom (MgAlg) zbog smanjivanja udjela kristalne faze PEO-a čime bi se trebala poboljšati vodljivosti PEO-a. Pomoću ekstrudera s dvopužnim kontrarotirajućim vijcima uspješno su pripravljene mješavine PEO/MgAlg. Infracrvenom spektroskopijom s Fourierovom transformacijom (FTIR) nisu potvrđene jake interakcije između PEO-a i MgAlg-a. Diferencijalnom pretražnom kalorimetrijom (DSC) istraživan je utjecaj MgAlg-a na toplinska svojstva i kristalnost PEO-a. MgAlg ima najveći utjecaj na kristalizaciju PEO-a iz taline. Udio kristalne faze PEO-a kod svih mješavina je velik i gotovo nepromijenjen u odnosu na ekstrudirani čisti PEO-u. Uočena je djelomična mješljivost mješavine PEO/MgAlg. Toplinska postojanost mješavina istraživana je neizotermnom termogravimetrijom (TG). Polimerne mješavine PEO/MgAlg razgrađuju se u tri stupnja razgradnje, a dodatkom i povećanjem udjela MgAlg-a u mješavini dolazi do smanjenja njihove toplinske postojanosti. Najveći potencijal za pripravu SPE s kalcijevim solima ima mješavina 80PEO/20MgAlg.
Abstract (english)
The modification of the properties of poly(ethylene oxide) (PEO) was performed with magnesium alginate (MgAlg) due to the reduction of the crystalline phase of PEO, which should improve the conductivity of PEO. PEO/MgAlg mixtures were successfully prepared using twin-screw counter- rotating screw extruders. Fourier transform infrared spectroscopy (FTIR) did not confirm strong interactions between PEO and MgAlg. Differential scanning calorimetry (DSC) was used to investigate the influence of MgAlg on the thermal properties and crystallinity of PEO. MgAlg has the greatest influence on the crystallization of PEO. The degree of crystallinity of PEO in all mixtures is large and almost unchanged compared to pure extruded PEO. Partial miscibility of the PEO/MgAlg mixture was observed. The thermal stability of the mixtures was investigated by non-isothermal thermogravimetry (TG). Polymer mixtures of PEO/MgAlg decompose in three stages of decomposition, and the addition and increase of the proportion of MgAlg in the mixture leads to deterioration of their thermal stability. The mixture 80PEO/20MgAlg has the greatest potential for the preparation of SPE with magnesium salts.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:524944
Study programmeTitle: Chemical Technology; specializations in: Chemical Engineering, Environmental Protection
Course: Chemical Engineering
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
Embargo expiration date: 2023-05-21
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Created on2022-10-21 06:10:39