What are the functions of nucleating agents?

Different nucleating agents have obviously different modification effects. Some nucleating agents, such as the third generation sorbitol nucleating agent WBQ, can improve the transparency of polypropylene; Some nucleating agents, such as WNA- 108, can improve the mechanical properties of polypropylene, such as hardness, while others can improve the heat resistance of polypropylene, such as patented product WBG-II.

On the other hand, different nucleating agents have the function of * * * communication. The functions of these * * * links are as follows:

1、? Nucleating agent can change the crystallization characteristics of polypropylene, thus affecting its physical and mechanical properties. For semi-crystalline polymers, crystallization behavior and grain structure directly affect the processing and application properties of products. Adding a small amount of nucleating agent into polymer materials can accelerate the crystallization process, increase the nucleation density, and make the grains fine and evenly distributed, but it has little effect on the chemical structure and other properties of the materials.

2、? The increase of crystallization speed shortens the mold cycle, improves the production efficiency and reduces the molding shrinkage of the product.