Recently carbon nanotubes are considered as nanoscale fibers which can strengthen polymer composite materials. Nanotube-polymer composite materials can be used for micron scale devices with designed mechanical properties and smart polymer coating to protect materials under extreme physical conditions. To explore these possibilities it is important to develop a detailed atomic scale understanding of the mechanical coupling between polymer matrix and embedded nanotubes. In this work we study the mechanical properties of polymer-carbon nanotubes (CNT) composite using molecular dynamics (MD). We will discuss the contribution of Van der Waals potential to the load transfer from matrix to nanotube. Our MD simulations show that polymer can chemically bonded to CNT. We will discuss about the resulting mechanical coupling between the CNTs and polymer matrix to develop an efficient nano-composite materials.