Chemical workers are well aware that plastic production requires the addition of plasticizers to improve flexibility. Choosing the right plasticizer can also enhance durability and compatibility. So, how should one choose a plasticizer? What performance indicators should be considered?
Ideally, a plasticizer should have good compatibility with the resin, high plasticizing efficiency, good durability, cold resistance, stability, and insulation properties. It should also be non-toxic and offer excellent processing and flame-retardant properties, while being affordable and readily available.
Compatibility refers to the ability of two or more substances to mix without phase separation. As a plasticizer, it should first have certain compatibility with the resin, which is the most basic requirement.
The compatibility between the plasticizer and the resin depends on the polarity of the plasticizer itself and the similarity of their structures. Generally, plasticizers with similar polarity and structure to the plasticized resin have better compatibility. Usually, the compatibility between the plasticizer and the resin can be evaluated using the principle of "similar polarity leads to compatibility." That is, if the plasticizer and the resin have similar solubility parameter values, they have good compatibility.
In addition to compatibility, other factors to consider include plasticizing efficiency, durability, cold resistance, stability, etc.