20.500.12556/RUL-130016 Vpliv aditiva na termične in časovno-odvisne mehanske lastnosti recikliranega polipropilena The effect of additive on thermal and time-dependent mechanical properties of recycled polypropylene 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. 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. reciklirani polipropilen primarno recikliranje antioksidant termične lastnosti časovno-odvisne mehanske lastnosti degradacija polimera recycled poypropylene primary recycling antioxidant thermal properties time-dependent mechanical properties polymer degradation true false false [J. Skubic] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-09-10 08:30:31 2021-09-10 08:30:32 2023-11-16 08:16:38 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXII, 48 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 678.058.6:678.742.3:678.048(043.2) 233426 77223683 10519.pdf 10519.pdf 1 1BC789181D541EFE8C05A710714E9CAA 34bf15c6e7247390b13585fae06fd468fd553a63bcdb3f07e8f6008190477c4f 59e91a77-1200-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147067 Fakulteta za strojništvo 0 0 0