The characterization of polybutadiene will be demonstrated in this application note. The glass transition temperature is very important when considering the material for various applications. Being a rubber, the modulus and also the damping properties change dramatically on passing from the glassy to the rubbery state. Dynamic Mechanical Analysis (DMA) will show the extent of the change of both the modulus and tan d as the material goes through the glass transition. It will also characterize the glass transition temperature very precisely.