Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat

Barbarić, Marko

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master's thesis

Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat

diplosmki rad

2024. urn:nbn:hr:167:189199

Barbarić, Marko

University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

APA 6th Edition

Barbarić, M. (2024). Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat : diplosmki rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:189199

MLA 8th Edition

Barbarić, Marko. "Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat : diplosmki rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:167:189199

Chicago 17th Edition

Harvard

Barbarić, M. (2024). 'Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat : diplosmki rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 17 November 2024, https://urn.nsk.hr/urn:nbn:hr:167:189199

Vancouver

Barbarić M. Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat : diplosmki rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2024 [cited 2024 November 17] Available at: https://urn.nsk.hr/urn:nbn:hr:167:189199

IEEE

M. Barbarić, "Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat : diplosmki rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:167:189199

Cite this item: https://urn.nsk.hr/urn:nbn:hr:167:189199

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Title	Strukturna i toplinska karakterizacija kompozita polilaktidna kiselina/kalcijev laktat : diplosmki rad
Title (english)	Structural and thermal characterization of polylactic acid/calcium lactate composited : diploma thesis
Author	Marko Barbarić
Mentor	Sanja Perinović Jozić (mentor)
Committee member	Miće Jakić (predsjednik povjerenstva)
Committee member	Irena Krešić (član povjerenstva)
Committee member	Sanja Perinović Jozić (član povjerenstva)
Granter	University of Split Faculty of Chemistry and Technology (Division of Engineering and Chemistry) Split
Defense date and country	2024-07-19, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Chemical Engineering
Abstract	Modifikacija polilaktidne kiseline (PLA) provedena je dodatkom kalcijevog laktata (CL) s ciljem određivanja njegovog utjecaja na strukturna i toplinska svojstva te kristalnost PLA. Uspješno su određeni optimalni uvjeti za predmješanje početnih materijala kao i uvjeti ekstrudiranja na dvopužnom ekstruderu s kontrarotirajućim vijcima. Primjenom infracrvene spektroskopije s Fourierovom transformacijom (FTIR) utvrđeno je nepostojanje interakcija između PLA i CL. Diferencijalna pretražna kalorimetrija (DSC) je primijenjena u svrhu istraživanja utjecaja CL na toplinska svojstva i kristalnost PLA. Utvrđeno je nukleacijsko djelovanje CL pri čemu su toplinske značajke PLA ostale nepromijenjene neovisno o sastavu. Primjenom neizotermne termogravimterije (TG) istraživan je utjecaj CL na toplinsku postojanost PLA pri čemu je utvrđeno znatno narušavanje toplinske postojanosti PLA i s najmanjim udjelom CL (2 mas.%). S primijenjenim metodama analize nije utvrđen optimalan udio CL koji bi omogućio raspodjelu kalcijevih iona po masi bez narušavanja strukture i toplinskih svojstava PLA
Abstract (english)	The modification of polylactic acid (PLA) was carried out by adding calcium lactate (CL) with the aim of determining its influence on the structural and thermal properties, as well as crystallinity of PLA. Optimal conditions for premixing the initial materials as well as the extrusion conditions on a twin-screw extruder with counter-rotating screws were successfully identified. Fourier transform infrared spectroscopy (FTIR) revealed no interactions between PLA and CL. Differential scanning calorimetry (DSC) was applied to investigate the influence of CL on the thermal properties and crystallinity of PLA. The nucleating effect of CL was observed, while the thermal properties of PLA remained unchanged regardless of the composition. Non-isothermal thermogravimetry (TG) was used to study the influence of CL on the thermal stability of PLA. Significant degradation of the thermal stability of PLA was determined, even with the smallest addition of CL (2 wt.%). By applying analysis methods, the optimal CL content was not established. By applying analysis methods, the optimal CL content that would allow the distribution of calcium ions by mass without disrupting the structural and thermal properties of PLA, was not established.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:167:189199
Study programme	Title: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures, Materials and Environmental protection 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 resource	Text
File origin	Born digital
Access conditions	Open access
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Created on	2024-09-04 07:49:13