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master's thesis
Utjecaj toplinske povijesti na svojstva polimera
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:363662
Kužnar, Maks
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Kužnar, M. (2020). Utjecaj toplinske povijesti na svojstva polimera (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:363662

Kužnar, Maks. "Utjecaj toplinske povijesti na svojstva polimera." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:363662

Kužnar, Maks. "Utjecaj toplinske povijesti na svojstva polimera." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:363662

Kužnar, M. (2020). 'Utjecaj toplinske povijesti na svojstva polimera', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 14 January 2025, https://urn.nsk.hr/urn:nbn:hr:235:363662

Kužnar M. Utjecaj toplinske povijesti na svojstva polimera [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2025 January 14] Available at: https://urn.nsk.hr/urn:nbn:hr:235:363662

M. Kužnar, "Utjecaj toplinske povijesti na svojstva polimera", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:363662

Metadata
TitleUtjecaj toplinske povijesti na svojstva polimera
Title (english)The effect of thermal history on the properties of polymers
AuthorMaks Kužnar
MentorTatjana Haramina (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-07-07, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
Svojstva polimera uvelike ovise o njihovoj strukturi. Struktura plastomera ovisit će o uvjetima zagrijavanja i hlađenja. Uz pomoć dinamičko-mehaničke analize provedena je usporedba utjecaja toplinske povijesti na svojstva kopolimera etilena i metakrilne kiseline E/MAA. U prvom slučaju u prvom mjerenju materijal je grijan do temperature taljenja i sporo hlađen na sobnu temperaturu, a zatim je s istim ispitnim tijelom ponovljeno mjerenje. U drugom slučaju materijal je u prvom ciklusu mjeren samo do gumastog stanja, hlađen na isti način te je nakon toga također ponovljeno mjerenje. Pokazalo se da uvjeti hlađenja i zagrijavanja imaju utjecaj na stupanj kristalnosti, djelovanje vlage kao omekšavala, oksidaciju i razgradnju makromolekula, te stoga i na temperaturni interval prijelaza iz staklastog u gumasto stanje, kao i temperaturu mekšanja kristala pri početku taljenja. Dobiveni rezultati ukazuju na važnost optimiranja parametara prerade s ciljem dobivanja željene strukture, te redukciju broja ciklusa zagrijavanja i hlađenja materijala.
Abstract (english)
The properties of polymers largely depend on their structure. The structure of the plastomer will depend on the heating and cooling conditions. With the help of dynamic-mechanical analysis, a comparison of the influence of thermal history on the properties of copolymer (ethylene and methacrylic acid, E / MAA) was performed. In the first case in the first measurement the material was heated to the melting temperature and slowly cooled to room temperature, and then the measurement was repeated. In the second case the material was only heaten up to the rubber state in the first heating cycle, cooled to room temperature and after that the measurement was also repeated. Cooling and heating conditions have been shown to affect the degree of crystallinity, the effect of moisture as a plasticizer, the oxidation and decomposition of macromolecules, and therefore the temperature interval of transition from glassy to rubbery state, as well as the softening temperature of crystals. The obtained results indicate the importance of optimizing the processing parameters in order to obtain the desired structure, and reducing the number of heating and cooling cycles of the material.
Keywords
Languagecroatian
URN:NBNurn:nbn:hr:235:363662
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-07-06 20:37:15