The effect of processing temperature of PBT raw materials on their mechanical properties

PBT (polybutylene terephthalate) is an important engineering plastic with key mechanical properties in a variety of applications. Processing temperature is one of the important factors affecting the mechanical properties of PBT raw materials. It has a significant impact on its molecular arrangement, crystallization degree and crystal morphology, which in turn affects its mechanical properties such as hardness, strength, toughness and wear resistance.

In terms of strength, appropriate processing temperature can promote the orderly arrangement and crystallization of PBT molecules, making its crystal structure more complete, thus improving the strength of the material. Higher processing temperatures facilitate the movement and arrangement of molecules, favoring the formation of larger crystal structures, thereby increasing the tensile and compressive strength of the material.

Regarding hardness, processing temperature also affects the hardness of PBT. Appropriate processing temperature can make the PBT crystal structure denser and increase the hardness of the material. Higher processing temperatures help the growth and arrangement of crystals and increase the interaction between crystals, thereby increasing the hardness and stiffness of the material.

In terms of toughness, processing temperature also has a certain impact on the toughness of PBT. Appropriate processing temperature is conducive to making the PBT crystal structure uniform, enhancing the interaction between molecules, and improving the toughness and impact resistance of the material. Too high or too low processing temperature may lead to uneven crystallization of PBT or defects in the crystal, thus affecting the toughness and fatigue resistance of the material.

In addition, processing temperature will also affect the wear resistance of PBT. Appropriate processing temperature can make the PBT crystal structure denser and improve the wear and tear resistance of the material. Higher processing temperatures help improve the material's surface hardness and wear resistance, extending its service life.