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undergraduate thesis
Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita
završni rad
2020. urn:nbn:hr:167:251701
Magaš, Klara
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Magaš, K. (2020). Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:251701

Magaš, Klara. "Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:251701

Magaš, Klara. "Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:251701

Magaš, K. (2020). 'Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 18 November 2024, https://urn.nsk.hr/urn:nbn:hr:167:251701

Magaš K. Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2020 [cited 2024 November 18] Available at: https://urn.nsk.hr/urn:nbn:hr:167:251701

K. Magaš, "Utjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:251701

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Metadata
TitleUtjecaj molekulske mase poli(etilen-oksida) na svojstva PEO/kloro f, hib-POSS nanokompozita : završni rad
Title (english)The influence of the molecular weight of poly(ethylene oxide) on the properties of PEO/chloro f, hib-POSS nanocomposites : bachelor thesis
AuthorKlara Magaš
MentorNataša Stipanelov-Vrandečić (mentor)
Committee memberMiće Jakić (predsjednik povjerenstva)
Committee memberMario Nikola Mužek (član povjerenstva)
Committee memberNataša Stipanelov-Vrandečić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2020-07-10, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U ovome radu pripravljeno je osam različitih uzoraka od kojih prva četiri predstavljaju čisti PEO različitih molekulskih masa (100 000, 300 000, 1·10 6 i 5·10 6 ) a druga četiri predstavljaju kompozite kojima je dodano 5% nanočestica kloro fenil hepta izobutil poliedarskog oligomernog silseskvioksana (PEO/kloro f,hib-POSS). Uzorci su pripremljeni metodom taljenja u statičkim uvjetima te analizirani metodom diferencijalne pretražne kalorimetrije i infracrvene spektroskopije s Fourierovom transformacijom. Cilj ovog rada bio je odrediti toplinske karakteristike PEO/POSS nanokompozita, istražiti interakcije PEO-a i POSS-a te zaključiti o mogućnosti modifikacije svojstava PEO-a dodatkom kloro f,hib-POSS u cilju smanjivanja kristalne faze PEO-a. Nađeno je da je PEO djelomično kristalni polimer koji pokazuje staklasti prijelaz u temperaturnom području od -60 do -50 °C i talište u temperaturnom području od 55-95 °C. Najveći udio kristalne faze ima PEO molekulske mase 100 000 i iznosi 70 %, dok ostali PEO-i molekulske mase 300 000, 1·10 6 i 5·10 6 imaju od 60 – 65 % kristalne faze. Navedenim metodama istraživanja nisu potvrđene interakcije polimera i nanočestica. Izostanak interakcija PEO-a i kloro f,hib POSS nanočestica najvjerojatnije je posljedica loše dispergiranosti nanočestica u polimernoj matrici. Naime, kod priprave nanokompozita metodom taljenja u statičkim uvjetima može doći do aglomeracije nanočestica te se dobije obični kompozit, a ne nanokompozit.
Abstract (english)
In this thesis, eight different samples were prepared, the first four represent pure PEO of different molecular weights (100 000, 300 000, 1·10 6 , 5·10 6 ) and the other four represent composites to which 5% nanoparticles of chloro phenyl hepta isobutyl polyhedral oligomeric silsesquioxane (PEO/chloro f,hib-POSS) were added. Samples were prepared by the melting method in the static conditions and analyzed by differential scanning calorimetry and FT-IR spectroscopy. The aim of this study was to determine the thermal characteristics of PEO/POSS nanocomposites, to investigate the interactions of PEO and POSS and to conclude about the possibilities of modifying the properties of PEO by adding chloro f,hib-POSS in order to reduce the crystal phase of PEO. PEO was found to be a partially crystalline polymer showing glass transition in the temperature range of -60 °C to -50 °C and a melting in the temperature range of 55-95 °C. The largest crystalline phase has a PEO of molecular mass of 100 000 and it is 70% while other PEOs have from 60 to 65% of the crystalline phase. The applied methods did not confirm the interactions between polymers and nanoparticles. The absence of interactions of PEO and chloro f,hib-POSS nanoparticles is most likely due to poor dispersion of nanoparticles in the polymer matrix. During the preparation of nanocomposites by the melting method in static conditions, agglomeration of nanoparticles can occur and the result is regular composite, not a nanocomposite.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:251701
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
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Created on2020-07-21 09:54:32