The results of the tensile test show that the faster the tank cools, the higher the amount of tension at the rupture point. This test also showed that the air cooling method has a lower elongation at break point than the other two methods.
Investigation of the effect of cooling the produced polyethylene tanks by rotary molding method on the final mechanical and thermal properties
In the thermal properties results section, it was found that higher cooling speeds cause thicker crystals in the part that higher energy is required to overcome these thick crystals. According to the results of thermal properties and using the softening temperature test, it was determined that the higher the cooling rate, the higher the softening temperature, which will improve the use of the tank in high temperature conditions. Melt flow rate and density tests were also performed to confirm the results of mechanical and thermal properties. Charpi impact test was performed at ambient temperature to confirm the mechanical behavior of the crystal structure. The results show that the best way to cool is the water cooling method.