Comparative Analysis of Structure and Mechanical Properties of Kavler-49 and Heterocyclic Para-aramid Fibers

The F-3 is a traded name of a new type of heterocyclic para-aramid fibers. The relationship between structural parameters and mechanical properties of F-3 has been investigated compared with the Kevlar-49 and Armos. The results showed that the tensile properties of F-3 were higher than those of Kevlar-49 and Armos, resulting from the higher orientation of chains and lower procrystalline parameter for F-3. Based on the results of tensile recoil test, the compressive strength of F-3, Kevlar-49, and Armos was approximate within experimental error. It is suggested that the combination of orientation parameter and shear modulus between adjacent chains results in the approximate compressive strength of F-3, Kevlar-49, and Armos.