Vpliv aditiva na termične in časovno-odvisne mehanske lastnosti recikliranega polipropilena

diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo

Jakob Skubic (Author), Lidija Slemenik Perše (Mentor)

Abstract

Namen diplomske naloge je določiti termične in časovno-odvisne mehanske lastnosti recikliranega polipropilena, pri tem pa opazovati vpliv dodatka aditiva na spremembo teh lastnosti. Polipropilen smo primarno reciklirali s pomočjo ekstruzije, pri vsaki stopnji smo odvzeli vzorec za analizo lastnosti. Reciklirani polipropilen smo večkrat analizirali z diferenčno dinamično kalorimetrijo in testi lezenja. Rezultati so pokazali, da polipropilenu s številom reciklov razpadajo verige, kristaliničnost se veča. Z dodatkom aditiva se degradacija zmanjša, aditiv zmanjša možnost cepljenja verig, kristaliničnost pade, material pa je uporaben manj časa.

Keywords

diplomske naloge;reciklirani polipropilen;primarno recikliranje;antioksidant;termične lastnosti;časovno-odvisne mehanske lastnosti;degradacija polimera;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[J. Skubic]
UDC:	678.058.6:678.742.3:678.048(043.2)
COBISS:	77223683
Views:	483
Downloads:	85
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	The effect of additive on thermal and time-dependent mechanical properties of recycled polypropylene
Secondary abstract:	The aim of the thesis was to determine thermal and time-dependent mechanical properties of recycled polypropylene and observing the influence of additive on these properties. Polypropylene was mechanically recycled with extrusion, on every stage sample was taken for analysis. Recycled polypropylene was analysed experimentally using differential scanning calorimetry and creep test. With increased cycles of mechanical recycling, chain scission is observed, crystallinity and lifetime of material are increasing. With addition of additive degradation of polypropylene is reduced, spliting of chains slows down, crystallinity and lifetime of material decrease.
Secondary keywords:	thesis;recycled poypropylene;primary recycling;antioxidant;thermal properties;time-dependent mechanical properties;polymer degradation;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XXII, 48, [11] pril. str.
ID:	13363284