Equipment design for investigation of substances decomposed under the pressure of self-generated atmosphere by means of thermal analysis

Thermodynamics of hexachlorocyclotriphosphazene and octachlorocyclotetraphosphazene fromT→ 0 toT= 450 K

“…(10,11) This calorimeter made it possible to obtain C o p,m of the substances in the condensed state with an uncertainty of (1 to 4) per cent in the temperature range T = 200 K to T = 700 K at a heating rate from (0.0033 to 0.1) K·s −1 , to measure the molar enthalpy of melting and other phase transitions with an error of 1.5 per cent, and to determine melting temperatures to a precision of 0.1 K.…”

Thermodynamics of Linear Poly(pentamethylene urethane) and Poly(hexamethylene urethane) in the Range from 0 to 450 K

“…The analysis of the results showed that the uncertainty in the heat capacity measurements at helium temperatures was about 2%, 0.5% between 10 and 40 K and 0.2% from 40 to 345 K. To study the heat capacity and the temperatures and enthalpies of physical transitions of substances over the range 300-450 K, a dynamic calorimeter -an automatic thermoanalytical complex operating by the principle of the triple thermal bridge -was used. [12,13] The calorimeter design and the measurement technique of heat capacity, temperatures and enthalpies of physical transformations were demonstrated in detail. [12][13][14] The reliability of the calorimeter operation was verified by measuring the heat capacity of standard synthetic corundum as well as the thermodynamic quantities of a fusion of indium, tin and lead.…”

“…[12,13] The calorimeter design and the measurement technique of heat capacity, temperatures and enthalpies of physical transformations were demonstrated in detail. [12][13][14] The reliability of the calorimeter operation was verified by measuring the heat capacity of standard synthetic corundum as well as the thermodynamic quantities of a fusion of indium, tin and lead. It was found that the calorimeter and the measurement procedure made it possible to obtain the heat capacities of substances in solid and liquid states with an uncertainty of AE1.5%, the physical transformation temperatures within about AE0.5 K and the enthalpies of transitions with an error of AE1%.…”