Dielectric relaxation in mixtures of N,N-dimethylacetamide with some aliphatic alcohols

The complex permittivity of mixtures of N,N-dimethylacetamide (DMA) with methanol, ethanol, propan-1-ol and butan-1-ol has been measured in the frequency range from 20 MHz to 36 GHz at 20 °C. The results can be described as a superposition of two Debye terms. The dominating (lower-frequency) term is assumed to be due to self- and hetero-association, while the other term is presumably due to the non-associated part of the liquid.