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 orV) 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 αp and kt 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 for isobaric phase changes in ¯110S5 liquid crystal (4-n-pentyl-phenyl-thiol-4′-decycloxybenzoate) at 134.6 MPa. A special attention is paid to the determination of αp for dense liquids, theoretical interpretation of its pressure-temperature behavior and the use of the new technique in verification of equations of state for dense condensed systems.
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