20.500.12556/RUL-134167 Analiza recikliranja polietilena visoke gostote s primesmi funkcionalnih dodatkov Analysis of recycling of high density polyethylene with additions of functional additives Zaradi vse večjega kopičenja odpadnih polimernih materialov je postalo globalno vprašanje, kako jih reciklirati in pri tem ohraniti njihove pomembne mehanske lastnosti. Polietilen visoke gostote (HDPE) predstavlja velik del našega vsakdanjika. V magistrski nalogi smo raziskovali, ali se recikliranemu materialu HDPE po večkratnem injekcijskem brizganju in ponovnem recikliranju spremenijo mehanske lastnosti, predvsem natezna trdnost, in termične lastnosti, kot so temperatura taljenja, kristalizacije ter njuni entalpiji. Natezno trdnost smo preverjali z nateznim preizkusom. Termične lastnosti polimera, kot so temperatura taljenja, kristalizacije, njuni entalpiji in stopnja kristalizacije, smo analizirali z metodo diferenčne dinamične kalorimetrije (DSC). Pri tem smo ugotovili, da se natezna trdnost in termične lastnosti po desetih brizganjih pri izbranih parametrih ne spremenijo za več kot 10 % v primerjavi z osnovnim materialom. Due to the growing accumulation of waste polymeric materials, it has become a global question how to recycle them while maintaining their important mechanical properties. High density polyethylene (HDPE) is a big part of our daily lives. In the master's thesis, we investigated whether the recycled HDPE material changes its mechanical properties after repeated injection molding and recycling, especially tensile strength and thermal properties, such as melting and crystallization temperature and their enthalpies. The tensile strength was checked by a tensile test. The thermal properties of the polymer, such as melting and crystallization temperature, enthalpies and crystallization rate, were analyzed by differential dynamic calorimetry (DSC) method. We found that the tensile strength and thermal properties after ten injections at the selected parameters do not change by more than 10% compared to the primary material. polietilen visoke gostote injekcijsko brizganje natezni preizkus recikliranje diferenčna dinamična kalorimetrija polimeri high density polyethylene injection molding tensile test recycling Differential Scanning Calorimetry polymers true false false [A. Zakšek] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2021-12-25 08:30:43 2021-12-25 08:30:46 2023-11-16 09:13:29 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXII, 66 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 678.742.2:678.058.6(043.2) 237693 92521987 13615.pdf 13615.pdf 1 174B7B0DBB46CA21C1128EDA66DC16EA ed52c69fecac7020b6a83c7d3d37b7d455832a65d3e889c433715942c9fea285 6ddf4f46-6554-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152499 Fakulteta za strojništvo 0 0 0