Broadband Dielectric Study of Dynamics of Poly(vinyl pyrrolidone)−Ethylene Glycol Oligomer Blends

摘要: Broadband dielectric measurements for blends of poly(vinyl pyrrolidone) (PVP) and ethylene glycol oligomer (EGO) from 0 to 40 wt % PVP were carried out at 25 °C in the frequency range 20 Hz GHz. The EGOs used this study (EG), diethylene (2EG), PEG400 (MW = 400). For PVP−EG, −2EG, −PEG400 blends, relaxation processes caused by motion EGO GHz micro-Brownian chain 10 kHz−1 MHz observed. Although PVP−EGO blend is miscible, molecular local observed individually. time showed a strong concentration dependence solvent viscosity dependence, which are similar those reported so far solutions nonpolar solvents.