Morfologija i dimenzijska stabilnost mješavine EPDM kaučuka i reciklirane gume

undergraduate thesis

• Title (english): Morphology and dimensional stability of EPDM and recycled rubber blends
• Author: Ivana Živković
• 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: 2015-09-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

U ovome radu provedena su ispitivanja djelovanja nafte na dimenzijsku stabilnost polimerne mješavine etilen/propilen/dienskog kaučuka (EPDM) i reciklirane gume tj. bubrenje mješavine u nafti. Pripremljene su tri serije uzoraka koje su sadržavale različite udjele gumenog reciklata. Prve dvije serije razlikovale su se po udjelu umrežavala, dok je treća serija imala miješani gumeni reciklat za razliku od prve dvije serije koje su sadržavale homogeni EPDM reciklat. Svim ispitivanim uzorcima određen je stupanj bubrenja u sirovoj nafti u vremenskom periodu od 0,5 h do 168 h.
Osim ovisnosti stupnja bubrenja o vremenu uzorcima je određena i morfologija pretražnom elektronskom mikroskopijom (SEM).
Iz rezultata je vidljivo da stupanj bubrenja polimernih mješavina u početku naglo raste, a zatim sve sporije te se nakon 7 dana postiže ravnotežni stupanj bubrenja nakon kojeg uzorak dalje ne bubri. Kod uzoraka koji su sadržavali homogeni EPDM reciklat vidljivo je da se stupanj bubrenja smanjuje s porastom udjela reciklata, dok u slučaju heterogenog reciklata stupanj bubrenja se povećava. Najfinija morfologija je vidljiva kod uzoraka koji sadrže veći udio umrežavala, a ti uzorci su pokazali i najmanje bubrenja, dok je kod uzoraka s miješanim reciklatom vidljiva vrlo gruba morfologija.

Abstract (english)

In this work investigation of effect of crude oil on dimensional stability i.e. swelling degree of polymer blend of ethylene/propylene/diene rubber (EPDM) and recycled rubber was carried out. Three series of samples containing different loadings of recycled rubber were prepared. The first two series had homogeneous EPDM recyclate but they have differed by crosslinking agent loading, while a third series had a heterogeneous mixed tire recyclate. For all tested samples, the swelling degree in crude oil over a period of 0.5 h to 168 h was measured. Besides the dependence of swelling degree on time, morphology of samples was determined using scanning electron microscopy (SEM). The results showed that the swelling degree of polymer blends increases fast in the beginning bur more slowly afterword and after 7 days equilibrium swelling degree is achieved after which the samples do not swell anymore. For samples containing homogeneous EPDM recyclate it is evident that the swelling degree decreases with increase of loading of recyclate, while in the case of heterogeneous recyclate swelling degree increases with recyclate loading. The finest morphology is visible in samples containing higher proportion of crosslinking agent, and these samples showed the smallest swelling degree, while the samples with mixed recyclate have very rough morphology.

• Keywords: polimerna mješavina; etilen/propilen/dienski kaučuk (EPDM); reciklirana guma; bubrenje
• Keywords (english): polymer blend; ethylene propylene diene rubber (EPDM); recycled rubber; swelling
• Language: croatian
• URN:NBN: urn:nbn:hr:149:700313
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2016-11-28 16:00:40