What are the issues to be aware of when choosing plasticizers?

- Mar 14, 2019-

Nowadays, there are more and more plasticizers, which makes many plastic products companies that are new to the industry do not know how to make choices when choosing plasticizers. Let me introduce to you what to pay attention to when choosing plasticizers:


1. Compatibility between plasticizer and resin. In general, the additive has good compatibility with the resin only: the additive can be stored in the product for a long time, stable and evenly, and effectively exerts its function. Function, if the compatibility is not good, it is prone to "sweating" or "blooming" phenomenon, but sometimes the compatibility is not good, the product requirements are not strict, and still have poor compatibility, such as filler The compatibility with the tree wax is extremely poor. As long as the particle size of the filler is small, the performance requirement of the product can still be basically satisfied. Obviously, it can be fully treated with a coupling agent or a surfactant to fully exert its function.


 


2. Durability of plasticizer I The loss of auxiliary agent is mainly volatilized by three ways. The extraction and migration are mainly related to the molecular weight of the auxiliary agent, the solubility in the medium and the degree of decompression in the resin.


3. Adaptability of plasticizer to processing conditions: Some resin processing strips are more demanding. If the processing temperature is high, it should be considered whether the selected additives will decompose, and whether the additives have corrosive effects on the molds and equipment.


4. Restrictions on the use of additives for products: Products with different uses have certain requirements on the odor, toxicity, electrical properties, weathering properties and thermal properties of the additives.


5. The synergistic effect and relative resistance in the plasticizer blending. In the same resin system, sometimes two of the auxiliaries will produce a synergistic effect, which is much more effective than using one of the auxiliaries. However, if improperly combined, the "anti-effect" between the two auxiliaries weakens the function of each auxiliaries and even disables certain auxiliaries. This should be especially noted, such as carbon black and amines or phenols. The combination of agents will have an antagonistic effect.