ABSTRACT
The ranking of polymers is based on a reasonable selection of the more important physical properties, those that are discriminating and considered important by designers and others involved in the resin selection process. Tensile strength is another property of polymers that can be reproduced accurately enough to permit realistic comparisons among resins, provided test conditions are carefully controlled. Obviously, as the resin selection process begins to narrow down the choice to a few viable candidates, accurate creep data on those resins should be obtained from the material suppliers. The electrical properties of most plastics are excellent, particularly for those included in this comparison of engineering plastics. Since dielectric strength is a measure of the electrical strength of a material as an insulator, it is one of the two measurements of electrical properties to be important enough to be ranked.
