Structure and mechanical behaviors of thermoplastic polyurethane thin film coated polyamide 6 fibers part II. A solution coating method

Abstract

Thermoplastic polyurethane thin film (TPU) coated PA6 fibers were prepared by dipping fibers into a TPU solution. The thickness of the thin film coating was 20 μ m. A series of polymer glycols which include polycarbonate, polyether and polyester were used for the preparation of the TPU. Both tensile strength and elongation at break of the TPU coated fibers increased although both magnitudes of the TPUs are much lower than for the original PA6 fibers. Also there was a significant improvement in the abrasion resistance TPU coated PA6 fibers. The PA6 fibers are prone to micro-cracks when under mechanical stress but the TPU thin film coating delayed the formation of the micro-cracks, thereby improving the mechanical properties of PA6 fibers. The theoretical investigation on the effect of interface interaction region using the viscous flow model described could clearly explain the effect of the same on the mechanical performance of TPU coated PA6 fibers.

Thermoplastic self‐healing polymer blends for structural composites: Development of polyamide 6 and cyclic olefinic copolymer blends

“…The FT-IR spectrum of PA6 was extensively studied in the literature, 67,68 and the absorption bands located at 834, 929, 960, 1029, and 1200 cm À1 suggest that the crystalline structure PA6 utilized in the present work is mainly constituted by the α-crystalline phase. 68,69 According to Yeh et al, 70 the band at 3293 cm À1 (a) can be associated with the N H stretching vibration of hydrogen-bonded N H groups in the crystalline phase.…”

Polyamide 6 and thermoplastic polyurethane recycled hybrid Fibres via twin-screw melt extrusion

“…The blending of polyamide with TPU in injection moulding and compressed mould have been reported [28][29][30][31][32] but there is a paucity of reported work on fibre blending of PA6 and TPU. A study conducted by John and Furukawa [33] showed that PA6 fibres coated with TPU increase the tensile strength and the breaking elongation of the filaments.…”