What are Plasticizers? What is the role of plasticizers?

Environmentally friendly plasticizers refer to organic substances that increase the plasticizer of plastics, improve the fluidity of resins during molding processing, and make products flexible. It is usually some high-boiling, hard-to-volatilize viscous liquid or low-melting solid, and generally does not chemically react with plastics. The following Kain Chemical will teach you how to correctly choose a good quality environmentally friendly plasticizer.

1. Environmentally friendly plasticizers Compatibility between plasticizers and resins. Generally speaking, additives only have good compatibility with resins: Only in this way can the additives be stored in the product in a long-term, stable and uniform manner, and effectively perform their functions. If the compatibility is not good, the phenomenon of “sweating” or “blooming” will easily occur, but sometimes the compatibility is not good , the product requirements are not too strict, and there may still be poor compatibility. For example, the compatibility between the filler and resin wax is extremely poor. As long as the particle size of the filler is small, it can still basically meet the performance requirements of the product. Obviously, it is best to use even Joint agent or surfactant treatment, in order to give full play to its function.

2. Environmentally friendly plasticizers Plasticizer durability I The loss of additives is mainly volatilized through three channels, and the extraction and migration are mainly related to the molecular weight of the additives. The solubility in the medium is related to the solubility in the resin.

3. The adaptability of plasticizers to processing conditions: some resins have harsh processing conditions. If the processing temperature is high, it should be considered Whether the selected additives will decompose, and whether the additives will corrode the mold and equipment.

4. Constraints on additives by product use: Products with different uses have different effects on odor, toxicity, electrical properties, weatherability, thermal properties, etc. of additives. Certain requirements.

5. The synergistic effect and relative antagonism in plasticizer compounding. In the same resin system, sometimes two of the additives will produce “synergistic effect”, Compared with using a certain additive alone, the effect is much greater. However, if the combination is improper, the “antagonistic effect” between the two additives will weaken the function of each additive, and even make a certain additive lose its effect. Special attention should be paid to this point, if carbon black is used together with amine or phenolic oxygen disruptors, it will have an antagonistic effect