Effect of processing temperature of PBT raw materials on its crystallization properties

PBT is a semi-crystalline plastic, and its crystallization properties have an important influence on its physical properties and processing characteristics. Processing temperature is one of the key factors affecting the crystallization properties of PBT. Appropriate processing temperature can promote the crystallization process of PBT and improve its hardness, strength and heat resistance.

In the processing of PBT, the processing temperature has an important influence on its crystallization rate, degree of crystallization, crystallization morphology and crystallization defects. Higher processing temperature is conducive to promoting the crystallization rate of PBT, making the crystals form faster, thereby increasing the cooling rate of the product and improving production efficiency. Appropriate processing temperature can make the crystal structure of PBT more complete, the crystal size larger, and improve the hardness, strength and rigidity of the material. In addition, at the appropriate processing temperature, PBT can form an ordered crystal structure and improve the tensile, bending and fatigue resistance of the material.

However, too high or too low processing temperature may lead to insufficient crystallization and affect the physical properties of the material. Too high processing temperature may lead to uneven crystallization or irregular crystal morphology, affecting the performance stability of the material, and even leading to the generation of crystal defects, affecting the mechanical properties and surface quality of the material. At low temperatures, the crystallization rate is slow, which may lead to incomplete crystal structure and affect the hardness and strength of the material.

Therefore, it is very important to control the processing temperature of PBT. It is necessary to select the appropriate processing temperature according to the specific situation to ensure that the PBT material has good crystallization properties and excellent physical properties.