Nowadays, there are more and more types of plasticizers, which makes many new plastic products companies do not know how to choose plasticizers when choosing plasticizers. Here are some things to pay attention to when choosing a plasticizer:
1. The compatibility between the plasticizer and the resin. Generally speaking, only when the additive has good compatibility with the resin can the additive exist in the product in a long-term, stable and uniform manner, and effectively exert its function, if the compatibility is not good, the phenomenon of "sweating" or "blooming" will easily occur, but sometimes the compatibility is not good, and the product requirements are not too strict, and there can still be poor compatibilities, such as fillers and The resin waxes have very poor compatibility. 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 treat it with a coupling agent or a surfactant to fully exert its function.
2. Durability of plasticizers The loss of additives is mainly volatilized in three ways. The extraction and migration are mainly related to the molecular weight of the additives, the solubility in the medium, and the degree of dissolution in the resin.
3. The adaptability of the plasticizer to the processing conditions: some resins have harsh processing and stirring conditions. If the processing temperature is high, real-time consideration should be given to 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 certain requirements regarding the odor, toxicity, electrical properties, weather resistance, thermal properties, etc. of additives.
5. The synergistic effect and relative antagonism in the combination of plasticizers. In the same resin system, sometimes two of the additives will produce a "synergistic effect", which is much more effective than using one of the additives alone. However, if the combination is improper, the "antagonism" between the two additives will weaken the function of each additive, and even make some additives lose their effect. Special attention should be paid to this point, such as carbon black and amines or phenols interfering with oxygen Combination of agents will produce an antagonistic effect.