TY - JOUR

T1 - Dynamic Behavior of Thermally Affected Injection-Molded High-Density Polyethylene Parts Modified by Accelerated Electrons

AU - Mizera, Ales

AU - Krstulovic-Opara, Lovre

AU - Krempl, Nina

AU - Karhankova , Michaela

AU - Manas, Miroslav

AU - Sanek , Lubomir

AU - Stoklasek, Pavel

AU - Grebo, Alen

PY - 2022/11/16

Y1 - 2022/11/16

N2 - Polyethylenes are the most widely used polymers and are gaining more and more interest due to their easy processability, relatively good mechanical properties and excellent chemical resistance. The disadvantage is their low temperature stability, which excludes particular high-density polyethylenes (HDPEs) for use in engineering applications where the temperature exceeds 100 °C for a long time. One of the possibilities of improving the temperature stability of HDPE is a modification by accelerated electrons when HDPE is cross-linked by this process and it is no longer possible to process it like a classic thermoplastic, e.g., by injection technology. The HDPE modified in this way was thermally stressed five times at temperatures of 110 and 160 °C, and then the dynamic tensile behavior was determined. The deformation and surface temperature of the specimens were recorded by a high-speed infrared camera. Furthermore, two thermal methods of specimen evaluation were used: differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The result of the measurement is that the modification of HDPE by accelerated electrons had a positive effect on the dynamic tensile behavior of these materials

AB - Polyethylenes are the most widely used polymers and are gaining more and more interest due to their easy processability, relatively good mechanical properties and excellent chemical resistance. The disadvantage is their low temperature stability, which excludes particular high-density polyethylenes (HDPEs) for use in engineering applications where the temperature exceeds 100 °C for a long time. One of the possibilities of improving the temperature stability of HDPE is a modification by accelerated electrons when HDPE is cross-linked by this process and it is no longer possible to process it like a classic thermoplastic, e.g., by injection technology. The HDPE modified in this way was thermally stressed five times at temperatures of 110 and 160 °C, and then the dynamic tensile behavior was determined. The deformation and surface temperature of the specimens were recorded by a high-speed infrared camera. Furthermore, two thermal methods of specimen evaluation were used: differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The result of the measurement is that the modification of HDPE by accelerated electrons had a positive effect on the dynamic tensile behavior of these materials

KW - mechanical properties

KW - infrared thermography

KW - high-density polyethylene

KW - injection-molded technology

KW - temperature stability

KW - radiation cross-linking

U2 - 10.3390/polym14224970

DO - 10.3390/polym14224970

M3 - Article

VL - 14:2022

JO - Polymers 2022 / Advances in the Mechanical Behavior of Polymeric Materials)

JF - Polymers 2022 / Advances in the Mechanical Behavior of Polymeric Materials)

SN - 2073-4360

IS - 22

M1 - 4970

ER -