Scanning transitiometry for science and industry

Abstract

Basic principle of scanning transitiometry are presented. The new technique is based on a simultaneous recording of both mechanical and thermal variables of a thermodynamic transition induced by scanning one independent variable (p, T or V) while the other independent variable is being kept constant. Examples are given for applications of the new technique in materials science such as simultaneous determination of % and K x as a function of pressure for a crystalline polyethylene at 363 K, simultaneous determination of heat and volume of transition for isothermal fusion of polyethylene at 423 K and tbr isobaric phase changes in 1--0S5 liquid crysta! (4-n-pentyl-phenylthiol-4'-decycloxybenzoate) at 134.6 MPa. A special attention is paid to the determination of Ctp for dense liquids, theoretical interpretation of its pressure-temperature oehavior and the use of the new technique in verification of equations of state tbr dense condensed systems.

The microcalorimetry of lipid membranes

“…Different calorimeters have been designed for the measurement of the heat accompanying an isothermal pressure change, d Q/d p| T . Such techniques have been referred to as, e.g., piezothermal analysis [14], scanning transitiometry [15,16], pressure jump calorimetry [17,18] or pressure perturbation calorimetry (PPC), [7]. A related, adiabatic technique has been termed volume perturbation calorimetry [19][20][21][22].…”

The thermodynamics of simple biomembrane mimetic systems

“…Different calorimeters have been designed for measurement of the heat accompanying an isothermal pressure change, dQ / ∂ p | T . Such techniques have been referred to, for example, piezothermal analysis,[ 24 ] scanning transitiometry,[ 25 26 ] pressure jump calorimetry[ 27 ] or Pressure Perturbation Calorimetry (PPC). [ 7 28 ] A related, adiabatic technique has been termed as volume perturbation calorimetry.…”