Effects of interface on the dynamic mechanical properties of PET/nylon 6 bicomponent fibers

Abstract

Three types of drawn bicomponent fibers were investigated to find out the effects of interface on the crystallinity and the dynamic mechanical properties. They are in the form of side-by-side, alternating-radial, and island-sea types, and the core or island component is PET, and the sheath or sea component is nylon 6. From the results it is observed that the storage moduli of these fibers are higher and the maximum values of the loss tangent are lower than the values calculated by the Takayanagi parallel model. Also, the decrease of interfaces between the two components improves the crystallinity of the PET component in the bicomponent fibers compared with the single-component PET fiber. With the decrease in interfacial area, the maximum loss tangent decreases and the crystallinity increases at the same composition ratios. Among three types of bicomponent fibers, the side-by-side type-with the smallest interfacial area-has the highest crystallinity and the lowest maximum loss tangent.

Novel Bicomponent Functional Fibers with Sheath/Core Configuration Containing Intumescent Flame-Retardants for Textile Applications

“…For the superior performance of bicomponent fibers, a stable and uniform interface, with better adhesion of the components, is required [11,12]. Due to the mutual interaction of both the components involved in bicomponent spinning, and the thermal behavior and stress witnessed by each component in spin-line, during extrusion, is considerably different to what they experience in single component melt spinning [13,14]. This difference in their behavior may affect the development of the intended fiber structure.…”

Investigating electromagnetic shielding effectiveness of knitted fabrics made by barium titanate/polyester bicomponent yarn

“…10 The purpose of bicomponent fibers is to improve the material performance suitable for specific needs by tailoring one or more properties with minimum sacrifice of other properties. 11 Bicomponent core-sheath fibers have been attracting much attention because multifunctional properties can be imparted to these fibers without the loss of mechanical properties. 12 Either the symmetrical or asymmetrical form of this conjugation can be used to combine the properties of the core and sheath components.…”

Nanofibers from Melt Blown Fiber-in-Fiber Polymer Blends

“…These fibers-in-fiber structures are often referred to as “islands-in-the-sea”. Research carried out by Choi and Kim, and later by Fedorova and Pourdeyhimi, demonstrated that islands with a diameter on the order of 100 nm could be obtained. − The smallest fibers obtained using this technique, reported by Nakata et al, were generated by drawing a blend of polyamide (sea) and poly(ethylene terephthalate) (0.7 μm diameter islands) into 44 μm diameter fibers, followed by removal of the polyamide using formic acid . The poly(ethylene terephthalate) islands were drawn down to an average diameter of 39 nm.…”