Published online by Cambridge University Press: 26 February 2011
Poly(p-phenylene terephthalamide) [PPTA] was the first commercially successful lyotropic liquid crystalline polymer to be spun into fibers having excetonally high tensile properties [1,2]. Fibers of PPTA are commonly referred to as Kevlar®, and are a product of the du Pont de Nemours Company, Inc. These fibers are stronger than steel, and have found many applications, including use in sporting goods such as canoes, tires, bullet-proof vests, cables and pressure vessels.