Vpliv mešanja recikliranega in ne-recikliranega materiala na termične lastnosti HDPE materiala

Troha, Tadej (author), Slemenik Perše, Lidija (mentor)

Plastični materiali so med najbolj uporabljenimi materiali v današnji industriji. S povečanjem proizvodnje plastičnih izdelkov, je hkrati potrebno ugotoviti kako ravnati z odpadki in pri tem paziti na trajnostni razvoj. Ena izmed rešitev je recikliranje in ponovna uporaba materialov. V sklopu zaključne naloge sem s pomočjo metode diferenčne dinamične kalorimetrije (DSC) izmeril temperaturo kristalizacije, temperaturo taljenja ter entalpijo taljenja iz katere se izračuna stopnja kristaliničnosti za polietilen visoke gostote, ki je bil recikliran do sto recikliranih ciklov. Recikliranemu materialu se je dodal tudi ne-recikliran material in sicer v razmerju ne-recikliran/recikliran = 10/90, 30/70, 50/50, 70/30, 90/10. Ugotovljeno je bilo, da se temperatura tališča zmanjša za 3,39 % in temperatura kristalizacije za 2,39 % po stotem ciklu recikliranja, glede na ne-recikliran material. Sprememba je zanemarljivo majhna in je v praksi nepomembna. Stopnja kristaliničnosti se po stotem ciklu recikliranja zmanjša za 13,26 %. Če recikliranemu materialu dodamo ne-recikliran material, v razmerju ne-recikliran/recikliran = 90/10 ali 70/30 se stopnja kristaliničnosti do stotega cikla recikliranja spremeni zanemarljivo malo in iz tega vidika lahko material ponovno uporabimo.

• Language: Slovenian
• Keywords: hdpe, recikliranje, temperatura, kristalizacija, tališče, stopnja kristaliničnosti
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [T. Troha]
• Year: 2019
• Number of pages: XIV, 27 f.
• PID: 20.500.12556/RUL-110163
• UDC: 678.7:658.567.3(043.2)
• COBISS.SI-ID: 16953115
• Publication date in RUL: 12.09.2019

Secondary language

• Language: English
• Title: The effect of mixing recycled and non-recycled material on thermal properties of HDPE material

Abstract

Plastic materials are amongst the most used materials in today's industry. With increasing production of plastic products, it is essential to determine how to handle waste while keeping in mind a sustainable development. One solution is to recycle and reuse waste material. In my thesis I measured the crystallization temperature, melting temperature and melting enthalpy, which was used to calculate the degree of crystallinity of high-density polyethylene, which was recycled up to one hundred times. Raw material was also added to the recycled materials in the ratio of raw/recycled = 10/90, 30/70, 50/50, 70/30, 90/10. It was found that the melting temperature decreased by 3,39% and crystallization temperature by 2,39% after the hundredth recycling cycle compared to the raw material. From industrial point of view this change was negligible. The degree of crystallinity decreased by 13,26 % after the hundredth recycling cycle. However, if raw material was added to the recycled material in the ratio raw/recycled = 90/10 or 70/30, the change in degree of crystallinity was minimal and from this aspect the material can be successfully reused.

• Keywords: hdpe, recycling, crystallization, temperature, melting, crystallinity degree