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master's thesis
Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. urn:nbn:hr:149:052525
Ivić, Kristina
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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Ivić, K. (2018). Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:052525

Ivić, Kristina. "Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:052525

Ivić, Kristina. "Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:052525

Ivić, K. (2018). 'Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 17 July 2024, https://urn.nsk.hr/urn:nbn:hr:149:052525

Ivić K. Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2018 [cited 2024 July 17] Available at: https://urn.nsk.hr/urn:nbn:hr:149:052525

K. Ivić, "Utjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:149:052525

Metadata
TitleUtjecaj modifikacije TiO2 na svojstva poliakrilatnih sustava
Title (english)Influence of TiO2 modification on the properties of polyacrylate systems
AuthorKristina Ivić
MentorSanja Lučić Blagojević (mentor)
Committee memberSanja Lučić Blagojević (predsjednik povjerenstva)
Committee memberZrinka Buhin Šturlić (član povjerenstva)
Committee memberVesna Ocelić Bulatović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2018-09-26, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Chemical Engineering in Material Development
Abstract
Polimeri na bazi akrilata (PAK) imaju široku primjenu u proizvodnji boja, premaza, adheziva i sl. Nanočestice titanijevog dioksida mogu djelovati kao UV apsorberi, one se dodaju premazima na bazi poliakrilata kako bi poboljšali svojstva tako dobivenog zaštitnog premaza koji se koristi u raznim industrijama, poput drvne. Korištenje nanopunila za poboljšanje svojstava polimera dovelo je do razvoja polimernih nanokompozita koji imaju jedinstvena mehanička, električna, optička, kemijska i magnetska svojstva. Preduvjet za postizanje nanokompozita s poboljšanim svojstvima je dobra dispergiranost i raspodjeljenost nanopunila u polimernoj matrici. U ovom radu sintetizirana je poliakrilatna (PAK) emulzija te PAK/TiO2 emulzije s 1 % TiO2 punila postupkom in situ emulzijske polimerizacije. Kako bi se ispitao utjecaj modifikacije površine punila na svojstva dobivenih emulzija i filmova pripravljenih iz emulzija, površina TiO2 nanopunila modificirana je različitim vrstama silana, kationskim inicijatorom (AIBA) te neionskim emulgatorom (NE). PAK/TiO2 emulzijama su određivana reološka svojstva. Karakterizacija pripravljenih filmova bila je usmjerena na određivanje morfologije i mehaničkih svojstava filmova, te toplinskih svojstava filmova diferencijalom pretražnom kalorimetrijom (DSC) i termogravimetrijskom analizom (TGA). Rezultati su pokazali da modifikacija punila značajno povećava viskoznost PAK emulzije. Modifikacijom površine TiO2 punila dobije se ravnomjernija raspodjela punila unutar polimerne matrice u odnosu na sustav s nemodificiranim punilom. PAK i PAK/TiO2 filmovi pokazuju dva staklišta, a utjecaj punila očituje se u promjeni Tg1. Dodatak nemodificiranog i modificiranog punila PAK matrici u kasnijim stadijima toplinske razgradnje pomiče temperature razgradnje PAK matrice na više vrijednosti. Prekidno istezanje PAK/TiO2 filmova je više u odnosu na prekidno istezanje čistog PAK filma.
Abstract (english)
Acrylic based polymers (PA) are widely used in the manufacture of paints, coatings, adhesives etc. Since titanium dioxide can act as UV absorber, TiO2 is often added in polyacrylate coatings to improve PA usage as a protective coating in a different industries for instance wood industry. The use of nanofiller has led to the development of polymeric nanocomposites which have unique mechanical, electrical, optical, chemical and magnetic properties. To prepare nanocomposite with improved properties homogeneous dispersion of the filler in the polymer matrix has to be achieved. In this work polyacrylate (PA) emulsion and PA/TiO2 emulsions with 1 % TiO2 filler by in situ emulsion polymerisation process was prepared. In order to investigate the effect of filler surface modification on the properties of the PA emulsion and films obtained from the emulsion the surface of TiO2 nanofiller was modified by various types of silane, cationic initiator (AIBA) and nonionic emulsifier (NE). Rheological properties of PA/TiO2 emulsions were determined. Morphology, mechanical and thermal properties (DSC and TGA analysis) of the films were investigated. The results showed that modification of the filler significantly increases the viscosity of the PA emulsion. By modifying the surface of the TiO2 filler, a uniform dispersion of the filler inside the polymer matrix is obtained in relation to the unmodified filler system. PA and PA/TiO2 films show two glass transition temperatures and the influence of the filler is reflected in the change of Tg1. The addition of unmodified and modified TiO2 filler to PA matrix, at later stages of thermal degradation, displaces the degradation temperature of the PA matrix to higher values. Elongation at break of the PA/TiO2 films is higher than elongation of the pure PA film.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:052525
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-10-26 13:06:49