Mechanical properties of carbon nanotubes, their experimental measurements and applications. Keywords: carbon nanotubes, mechanical properties, composite materials Carbon nanotubes (CNTs) have current and potential applications in construction materials such as polymer composites due to their excellent mechanical properties. Unprecedented values ​​of Young's modulus, stiffness, strength and resilience make them perfect materials in mechanical applications such as polymer composites. The use of CNTs to improve the mechanical properties of plastics is one of the current areas of study. These excellent mechanical properties imparted to materials are to some extent the result of their nanoscale. Fibers have been used conventionally to improve the properties of materials, however, these fibers range in size from a few microns to millimeters, which decreases the area per unit mass available for interaction with materials. In the case of CNTs as a filler material, they offer a relatively higher area per unit mass to interact with the material and consequently provide better mechanical properties. THE...