Utjecaj homogenog i heterogenog reciklata na mehanička i toplinska svojstva EPDM gumenog proizvoda

master's thesis

• Title (english): Influence of recycled homogeneous and heterogeneous rubber on mechanical and thermal properties of EPDM rubber products
• Author: Renata Matić
• Mentor: Zlata Hrnjak-Murgić (mentor)
• Committee member: Zlata Hrnjak-Murgić (predsjednik povjerenstva)
• Committee member: Zvonimir Katančić (član povjerenstva)
• Committee member: Vanja Kosar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-02-26, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

U ovom radu pripremljene su 3 serije uzoraka EPDM gume, pri čemu su prva i druga serija sadržavale iste količine homogenog EPDM reciklata, a uzorci se razlikuju s obzirom na udio umrežavala. Treća serija uzoraka sadržavala je heterogeni, miješani reciklat koji se međusobno razlikuje po kemijskom sastavu (različite vrste guma). Utjecaj udjela reciklirane gume (reciklata) na svojstva uzoraka praćen je određivanjem mehaničkih i toplinskih svojstava, a praćena je i promjena svojstva uzoraka nakon termo - oksidativnog starenja na 100 °C u trajanju od 3 i 7 dana. Kompatibilnost EPDM gume s homogenim i heterogenim reciklatom provedena je praćenjem morfologije SEM analizom. Rezultati su pokazali da povećanjem udjela reciklata dolazi do pogoršanja mehaničkih svojstava. Termogravimetrijska analiza pokazala je da kod svih uzoraka dolazi do razgradnje u dva stupnja. Najnižu toplinsku postojanost pokazuju uzorci s najvećim udjelom reciklata i obrnuto, najveću stabilnost pokazuju uzorci s najmanjim udjelom. Pretražna elektronska mikroskopija (SEM) pokazala je razliku u morfologiji između uzoraka koji su sadržavali homogeni od uzoraka koji su imali heterogeni reciklat.

Abstract (english)

In this paper are prepared 3 series of EPDM rubber samples, where the first and second series contain the same amount of homogeneous EPDM recyclates, and the samples vary with the level of wetting. The third series of the samples contains a heterogeneous mixed recyclate, which differs in the chemical composition (different types of rubber). The influence of a recycled rubber level (recyclates) in the properties of the samples was determined by measuring the mechanical and thermal properties, which was also accompanied by changes in the properties of the samples after the thermo - oxidative ageing at 100 °C within 3 and 7 days. The compatibility of EPDM rubber with homogeneous and heterogeneous recycled materials was carried out by monitoring the morphology by means of SEM analysis. The results have shown that increasing the recycled material level leads to deterioration of mechanical properties. Thermogravimetric analysis has shown that all samples result in their decomposition in two steps. The lowest thermal stability is found in the samples with the highest level of the recycled material and vice versa, the greatest stability appeared in the samples with the smallest level. The scanning electron microscopy (SEM) analysis has shown the difference in morphology between the samples which contained the homogeneous recycled material from those which used to have a heterogeneous one.

• Keywords: polimeri; recikliranje; EPDM; reciklat; mehanička svojstva; termogravimetrijska analiza; SEM analiza
• Keywords (english): polymers; recycling; EPDM; recyclate; mechanical properties; thermogravimetric analysis; SEM analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:149:599227
• Study programme: Title: Environmental Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka ekoinženjerstva (magistar/magistra inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb
• Created on: 2017-03-23 14:01:50