RELATIONSHIPS BETWEEN THE MECHANICAL-PROPERTIES OF SYNTHETIC-FIBERS

The breaking stress (BS), breaking extension (BE), initial modulus (IM ), torsional modulus (TM) and breaking twist angle (BTA) of a wide ran ge of fibers were determined. The fibers included high performance and industrial fibers whose BTA values had not been determined previously . BTA, as a measure of brittleness, evaluates fiber properties under s hear rather than tensile stress and the relationships between BTA and BE and also IM were developed. IM/TM is a measure of the lengthwise to lateral cohesiveness of a fiber and is shown to correlate highly with breaking stress. The effects of chemical and fine structure on the me asured mechanical properties of the fibers are discussed.