Abstract
The temperature ageing of high-density polyethylene (HDPE) modified by accelerated electrons was studied. Commodity plastic HDPE was used as a basic polymer material which was modified by radiation cross-linking. This polymer was used because of its excellent processability and chemical resistance. Plastic injection molding technology was used for the production of test specimens. These specimens were modified with the dose of radiation 33, 66, 99, 132, 165, and 198 kGy. The prepared specimens were tested to determine: gel content, degree of swelling, temperature stability, and changes in mechanical properties after temperature ageing. The results were determined by scanning electron microscopy (SEM) analysis on the fracture surfaces. The results of this study confirm that modification of HDPE by radiation cross-linking has a significant effect on increasing temperature stability. It has been shown that HDPE modified by radiation cross-linking can withstand temperatures exceeding the melting point of the original HDPE for a short-term.
Highlights
IntroductionPolymers are possibly used in all scientific and technical fields, and in common industries concerning each of us
Modified by Accelerated Electrons.Polymers are possibly used in all scientific and technical fields, and in common industries concerning each of us
high-density polyethylene (HDPE) with excellent processing conditions was used for our study, the resistance to temperature ageing is limiting
Summary
Polymers are possibly used in all scientific and technical fields, and in common industries concerning each of us. E.g., polyethylene (PE), have a very important place in the packaging industry. PE is widely used for its low cost, easy processability, and high chemical resistance. It is used for its irreplaceable properties in pipes and packaging, and as technical parts. A typical representative of commodity polymers is high-density polyethylene (HDPE), which excels with its good wear resistance, high fracture toughness, chemical stability, corrosion resistance, light weight, etc. The biggest disadvantage of HDPE is its relatively low temperature stability, which makes it impossible to apply this material where there may be a risk of the temperature rising above the tolerable limit
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