Instructions for use: The left-hand column lists the polymers in the approximate order of their polarities. The middle column lists the approximate order of polarity for the different classes of plasticizers. Generally, the higher the plasticizer is on the chart, the more likely it will be compatible with the polymers roughly opposite or below it on the chart. Depending on the formulation, exceptions may by found. As always when dealing with solubility parameters and polymer compatibilities, hard and fast rules cannot be made. However, by following this chart, the compounder should be able to choose the plasticizers which have the best chance of succeeding, bearing in mind other requirements such as low temperature flexibility, resistance to extraction, elongation, modulus, etc.

Information supplied by The C.P. Hall Company