Abstract
ABSTRACT Thermoplastic polyurethane (TPU) and carbon nanotubes (CNTs) were incorporated into polyamide 6 in an attempt to enhance notched impact resistance and damping performance. The morphology, mechanical, thermal and viscoelastic properties of different samples were studied. Scanning electron microscopy study indicated a uniform distribution of fine TPU droplets in PA6/TPU blend. Furthermore, well-dispersed CNTs in PA6/TPU matrix and good adhesion of polymer matrix to CNTs were observed. The addition of TPU into PA6 developed a rough fracture surface morphology and increased the notched impact strength equal to 39%, yet declined tensile and flexural resistance. The inclusion of CNTs into PA6/TPU improved mechanical properties comprising tensile, flexural and notched impact strengths as high as 14%, 12% and 16% respectively. The results of dynamic mechanical thermal analysis (DMTA) indicate: the addition of TPU into PA6 improves damping performance; the inclusion of carbon nanotubes in PA6/TPU enhances both energy storage and glass transition temperature.
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