Mehanske lastnosti recikliranega HDPE : diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo - Projektno aplikativni program

Mlaker, Pal (author), Bergant, Zoran (mentor), Šturm, Roman (comentor)

Diplomska naloga opisuje problem kopičenja plastičnih odpadkov po celem svetu, ter rešitve, kako jih zmanjšati, oziroma jih ponovno uporabiti. Predstavljen je razvoj različnih plastičnih mas skozi čas, ter opis plastičnih mas, ki se največ uporabljajo v današnjem svetu. Podrobneje je predstavljen material HDPE (High density polyethylene), ter njegove lastnosti. V eksperimentalnem delu naloge je opisan proces ločevanja in zbiranja odpadkov, ter priprave granulata, ki zajema rezanje in čiščenje. Granulat, ki smo ga pripravili je bil nato injekcijsko nabrizgan v epruvete za natezni preizkus. Predstavljeni so mehanski preizkusi, ki smo jih izvajali. Napravili smo natezni preizkus, Charpy-jev preizkus in preizkus trdote po Shore D načinu. Ugotovili smo da se mehanske lastnosti plastike z recikliranje poslabšajo, največji upad vrednosti smo izmerili pri nateznem preizkusu, medtem, ko se je trdota poslabšala le za majhen odstotek.

• Language: Slovenian
• Keywords: plastična onesnaženost, HDPE, recikliranje, priprava granulata, injekcijsko brizganje, natezni preizkus, Charpy-jev preizkus, preizkus trdote
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Publisher: [P. Mlaker]
• Year: 2024
• Number of pages: XX, 47 str.
• PID: 20.500.12556/RUL-160851
• UDC: 691.175:620.172:351.777.61(043.2)
• COBISS.SI-ID: 211111427
• Publication date in RUL: 05.09.2024

Secondary language

• Language: English
• Title: Mechanical properties of recycled HDPE

Abstract

This thesis describes the problem of the accumulation of plastic waste worldwide and the solutions to reduce or reuse it. It presents the evolution of different plastics over time and describes the plastics most used in the world today. High density polyethylene (HDPE) plastic material and its properties are presented in more detail. The experimental part of the thesis describes the process of separation and collection of waste, preparation of the granulate, including cutting and cleaning. The granulate prepared was then moulded into tubes for tensile testing. The mechanical tests conducted are presented. We have conducted a tensile test, a Charpy test and a Shore D hardness test. We found that the mechanical properties of the plastic deteriorate with recycling, the largest decrease in values was measured in the tensile test, while the hardness only deteriorated by a small percentage.

• Keywords: plastic pollution, HDPE, recycling, preparation of granulate, injection molding, tensile test, Charpy test, hardness test