chapter  2
104 Pages

Plastics Properties and Testing

There are two stages in the process of becoming familiar w ith plastics. The first is rather general and

involves an introduction to the unique molecular structures of polym ers, their physical states, and

transitions which have marked influence on their behavior. These have been dealt w ith in Chapter 1. The

second stage, which will be treated in this chapter, is more specific in that it involves a study of the specific

properties of plastics which dictate their applications. Besides the relative ease of molding and

fabrication, many plastics offer a range of important advantages in terms of high strength/weight

ratio, toughness, corrosion and abrasion resistance, low friction, and excellent electrical resistance. These

qualities have made plastics acceptable as materials for a wide variety of engineering applications. It is

important therefore that an engineer be aware of the performance characteristics and significant

properties of plastics.