Time Domain Reflectometric Studies on Methylcellosolve-acetylacetone Binary Solutions

Time Domain Reflectometric studies has been applied on the binary solutions of methylcellosolve (MCS) with acetylacetone (Acac) in the entire concentration range at 298 K in the frequency range of 10 MHz-32 GHz. The values of relaxation time (tau), effective Kirkwood correlation factor (g(eff)), corrective Kirkwood correlation factor g(f) and excess permittivity (epsilon(E)) have been calculated. The relaxation time of MCS slowly decreases with increase in Acac concentration suggesting that the size of the heteroassociated rotating unit decreases. The rate at which tau value decreases is more in MCS rich solutions which means that the formation of heteromolecular H-bonds dominantly occur in MCS rich solutions. Parallel orientation among the dipoles occur as suggested by the g(eff) values which are greater than unity in all the solutions. The excess permittivity epsilon(E) values calculated using mole and volume fractions qualitatively exhibit the same deviation from ideal behaviour.