Dynamic properties of the OE-MNR/HDPE TPVs were characterized using a rotorless oscillating shear rheometer (RheoTech MDPT, Cuyahoya Falls, USA) at 180 °C. The oscillation frequency was set in the range of 1–30 Hz at a constant strain of 3%. This was to assure that the test was in the range of linear viscoelasticity of the TPVs. The storage (G′) and loss shear (G″) moduli, loss factor, tan δ=G″/G″ as well as the complex viscosity (i.e., η*=3G*/ω=η″+iη′) of the TPVs were characterized.