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

被引：1

作者：

Mizera, Ales ^{[1
]}

Krstulovic-Opara, Lovre ^{[2
]}

Krempl, Nina ^{[3
]}

Karhankova, Michaela ^{[1
]}

Manas, Miroslav ^{[1
]}

Sanek, Lubomir ^{[1
]}

Stoklasek, Pavel ^{[1
]}

Grebo, Alen ^{[2
]}

机构：

[1] Tomas Bata Univ Zlin, Fac Appl Informat, Zlin 76005, Czech Republic

[2] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, HR-21000 Split, Croatia

[3] Univ Leoben, Dept Polymer Engn & Sci, A-8700 Leoben, Austria

来源：

POLYMERS | 2022年 / 14卷 / 22期

关键词：

mechanical properties; infrared thermography; high-density polyethylene; injection-molded technology; temperature stability; radiation cross-linking; CRYSTALLIZATION; DEFORMATION; DEGRADATION; ORIENTATION; VIBRATION; FIBERS;

D O I：

10.3390/polym14224970

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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 degrees 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 degrees 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.

引用

页数：15