Abstract
Polyethylene materials are the most widely used polymers which we encountered everywhere in our daily life. Some of the advantages of the polyethylenes are the diversity of production types, corrosion resistance, electrical insulation and recyclability. The main production methods are compression molding, transfer molding, rotational molding, injection molding, gas-assisted injection molding, extrusion and blown film extrusion techniques. It is possible to increase the mechanical properties of low density polyethylene materials by addition of high density polyethylene materials. Both polymer has same monomers but their chemical structure and bonding properties are different. Their physical properties can change with their chemical structure and bonding properties. In this study, 25%, 50% and 75% by weight of high density polyethylene were added to low density polyethylene. Granules were pre-mixed with a mechanical mixer before production of the samples. Plastic injection molding machine was used for specimen preparation. Density, hardness, tensile test, three-point bend test, compression test, tear test and Izod impact tests were performed. Densities and hardness values of the polymer blends decrease by the increasing amount of low density polyethylene. In general, it was observed that the mechanical properties of the polymer blends increase as the high density polyethylene content increase.
Highlights
Polymeric metarials, light weight, cheapness, insulation, sufficient mechanical properties, easy formability, decorative and ergonomic usage, chemically resistant and can be used for different purposes
The addition of 25% mass of high density polyethylene (HDPE) to Low density polyethylene (LDPE) polymer increases the density by 2% to 0.905 g/cm3
Increasing amount of HDPE addition to LDPE polymer 50% and %75 mass increases the density by %3 and %4 to 0.913 g/cm3 and 0.922 g/cm3 respectively
Summary
Light weight, cheapness, insulation, sufficient mechanical properties, easy formability, decorative and ergonomic usage, chemically resistant and can be used for different purposes. Due to these properties, it has wide usage fields such as machinery, chemistry, physics, textile, industry, medicine, biochemistry and biophysics. Polymer as a word which derives from the origin of poly means multiple and mer(meros) means structure from two Greek words. Monomers are the structures that can be connected to each other by covalent bonds to form large molecules. The production methods of polymers includes first the polymerisation of polymer as a Received: 15 November 2019; Accepted: 09 March 2020
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