VISCOSITIES OF LONG-CHAIN N-ALCOHOLS FROM 15-DEGREES-C TO 80-DEGREES-C

Viscosities of five n-alcohols from 1-hexanol to 1-tetradecanol were d etermined from 15 to 80 degrees C al 5 degrees C intervals. Plot of th e logarithm of viscosity vs. reciprocal absolute temperature were almo st linear. The energies of activation for viscous flow were determined for each of the alcohols and found to increase with increase in chain length. The intrinsic molar volumes V-O were determined by extrapolat ion to Zero fluidities. The fluidities Phi of the alcohols were found to obey tire equation Phi=B[(V-V-O)/V-O]exp(-E(B)/RT) where B is a con stant, V is the molar volume and E(B) is an energy term corresponding to the energy required for disrupting the association of the molecules . The values of E(B) were of the magnitude of the energy of hydrogen b ond. These values decrease marginally as the chain length increase.