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master's thesis
Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida)
diplomski rad
2019. urn:nbn:hr:167:196816
Sesar, Antonija
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Sesar, A. (2019). Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:196816

Sesar, Antonija. "Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:196816

Sesar, Antonija. "Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:196816

Sesar, A. (2019). 'Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 17 November 2024, https://urn.nsk.hr/urn:nbn:hr:167:196816

Sesar A. Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2019 [cited 2024 November 17] Available at: https://urn.nsk.hr/urn:nbn:hr:167:196816

A. Sesar, "Utjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:167:196816

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Metadata
TitleUtjecaj natrijevog alginata na pripravu i toplinska svojstva filmova poli(etilen-oksida) : diplomski rad
Title (english)The influence of sodium alginate on the termal properties of poly(ethilene oxide) films : diploma thesis
AuthorAntonija Sesar
MentorSanja Perinović Jozić (mentor)
MBZ: 267214
Committee memberMatko Erceg (predsjednik povjerenstva)
Committee memberMarina Zekić (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 country2019-09-12, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Modifikacija svojstava poli(etilen-oksida) (PEO) provedena je dodatkom natrijevog alginata (NaAlg) s ciljem urušavanja njegove kristalnosti i poboljšavanja vodljivosti. Uspješno su pripravljeni filmovi svih mješavina izlijevanjem iz otopine. Primjenom infracrvene spektroskopije s Fouierovom transformacijom (FT-IR) potvrđena je interakcija između PEO-a i NaAlg-a u vidu vodikovih veza. Diferencijalna pretražna kalorimetrija (DSC) je primijenjena u istraživanju utjecaja natrijevog alginata na toplinska svojstva i kristalnost PEO-a. Dodatak biorazgradljivog NaAlg-a, različita molekulna masa PEO-a i različita koncentracija početnih polimernih otopina složeno djeluje na toplinska svojstva PEO-a uz smanjivanje njegove kristalnosti kod pojedinih filmova polimernih mješavina. Toplinska postojanost mješavina istraživana je primjenom neizotermne termogravimetrije (TG). Polimerne mješavine PEO/NaAlg razgrađuju se u tri stupnja razgradnje. NaAlg pogoršava toplinsku postojanost filmova polimernih mješavina. Zaostala voda uslijed nedovoljnog sušenja filmova utječe na sva ispitivana stvojstva pripravljenog polimernog materijala što navodi na potrebu modificiranja postupka priprave filmova.
Abstract (english)
The modification of properties of poly (ethylene oxide) (PEO) was performed by adding sodium alginate (NaAlg) with the aim of reducing its crystallinity and improving its conductivity. Films of all blends were successfully prepared by solution casting method. By applying Fourier transform infrared spectroscopy (FT-IR) the interaction between PEO and NaAlg was confirmed in the form of hydrogen bonds. Differential scanning calorimetry (DSC) has been applied to investigate the influence of sodium alginate on the thermal properties and crystallinity of PEO. The addition of biodegradable NaAlg, different molecular weight of PEO and different concentration of starting polymer solutions have a complex effect on the thermal properties of PEO while reducing its crystallinity in some polymer blend films. The thermal stability of blends was investigated using non-isothermal thermogravimetry (TG). PEO/NaAlg polymer blends degrades throught three degradation steps. NaAlg impairs the thermal stability of polymer blend films. Due to insufficient film drying, residual water affects all the tested properties of the prepared polymer material, which leads to future modification of the film preparation.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:196816
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures
Course: Materials
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
Terms of useLicence In copyright icon
Created on2019-11-27 12:04:33