Acoustic nonlinearity parameter of liquid alkanes as a function of temperature, chain length and isomerism

The acoustic nonlinearity parameter B/A along with intermediate quantities such as the pressure derivative of sound speed and the phase shift were mea sured in 8 linear alkanes and a series of four isomers of hexane. The influ ences of temperature and chain length on these quantities were revealed. It was found that the phase shift parameter is more sensitive to molecular st ructure and temperature than B/A and that the pressure derivative of sound speed.