Karakterizacija kompozita polietilena sa željezovim oksidima diferencijalnom pretražnom kalorimetrijom

master's thesis

• Title (english): Characterization of polyethylene/iron oxides composites by differential scanning calorimetry
• Author: Josip Tepić
• Mentor: Ljerka Kratofil Krehula (mentor)
• Committee member: Ljerka Kratofil Krehula (predsjednik povjerenstva)
• Committee member: Emi Govorčin Bajsić (član povjerenstva)
• Committee member: Marija Vuković Domanovac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2021-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Polietilen se često upotrebljava kao matrica u kompozitima zbog svoje lake preradljivosti, kemijske otpornosti te dobrih mehaničkih svojstava. Izradom kompozita omogućuje se šira primjena u odnosu na čisti polimerni materijal. Željezovi oksidi prikladni su za širok spektar primjena pa i kao punila u polimernim kompozitima. Primjerice, imaju potencijal za ulogu UV stabilizatora u polimernoj matrici. U ovom su radu polimerni kompoziti sa željezovim oksidima ispitani metodom diferencijalne pretražne kalorimetrije. Kompoziti su sačinjeni od LDPE-a kao polimerne matrice (kontinuirane faze) te željezovih oksida kao nanopunila (diskontinuirane faze). Korišteni su sljedeći željezovi oksidi: akaganeit i hematit. Uzorci su podijeljeni u dvije skupine od kojih je jedna podvrgnuta UV starenju u UV komori. Rezultati pokazuju da su ispitani uzorci otporni na UV starenje, odnosno da navedeni oksidi pružaju efektivnu zaštitu polietilenu niske gustoće.

Abstract (english)

Polyethylene is often used as a matrix in composites due to its easy processability, chemical resistance and good mechanical properties. The production of composites allows a wider application in a relation to pure polymer material. Iron oxides are suitable for a wide range of applications and also as fillers in polymer composites. For example, they have the potential for the role of UV stabilizers in the polymer matrix. In this work, polymer composites with iron oxides were tested by the method of differential scanning calorimetry. The composites are composed of low density polyethylene (LDPE) as a polymer matrix (continuous phase) and iron oxides as fillers (discontinuous phase). The following iron oxides were used: akaganeite and hematite. The samples were divided into two groups, one of which was subjected to UV aging in an UV chamber. The results show that the tested samples are resistant to UV aging and that these oxides provide effective protection of low density polyethylene.

• Keywords: polimerni kompoziti; polietilen; željezovi oksidi; akaganeit; hematit; diferencijalna pretražna kalorimetrija; UV starenje
• Keywords (english): polymer composites; polyethylene; iron oxides; akaganeite; hematite; differential scanning calorimetry; UV aging
• Language: croatian
• URN:NBN: urn:nbn:hr:149:036819
• Study programme: Title: Materials Science and Engineering - Graduate study; 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: Closed access
• Created on: 2023-04-13 13:16:12