Textile fibers bulk study

Before embarking however on a study of the methods for the physical testing of textile polymer fibers it may be worthwhile first to establish a few related definitions for terms that differ from testing bulk polymers. 

The in situ polymerization of aniline to form an electrically conductive textile was also first reported by Kuhn and coworkers [78,79] in which the polyaniline was deposited onto a textile substrate from an aqueous solution containing aniline, ammonium persulfate, hydrochloric acid, and either the disodium salt of 2,6-naphthalenedisulfonic acid or 1,3-benzenedisulfonic acid. In these studies, the polymerization conditions were controlled in order to deposit the polyaniline layer only onto the textile support with no polymer precipitating in the bulk liquid phase. This was accomplished by using dilute solutions of aniline (0.03 M). A subsequent study by Tzou and Gregory [92] on the deposition of polyaniline to nylon-6 fibers was focused on investigating the reaction kinetics of the chemically oxidative polymerization of aniline... 

Mechanical properties probably are the most important properties of fibers. Fibers must possess sufficient mechanical properties so they can be converted into useful products, such as textiles, composites, etc. The mechanical properties of fibers also limit the performance potential that can be achieved by these products. There are many different types of mechanical properties, including tensile, torsional, bending, and compressional properties. Among them, tensile properties are the most widely studied for fibers, probably because of their unique shape. However, other types of mechanical properties also are important. This chapter begins with the basic definitions of Hooke s law, stress, strain, and tensile, bulk and shear moduli, followed by a detailed discussion on tensile, torsional, bending, and compressional properties of fibers. 

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