The thermodynamic properties of a series of longitudinal (main-chain) polymer liquid crystals were investigated by analysis
of their pressure–volume–temperature characteristics. It is possible to describe the behaviour of theses semi-rigid polymers
above the glass-transition temperature with excellent accuracy using a mathematically very simple equation of state: the Hartmann
Equation.
Polymer Liquid Crystals P–V–T measurements Hartmann equation of state
Electronic Publication