An automatic adiabatic calorimeter for intermediate and high temperatures

Sauerland, E.; Helwig, Jean-Jacques; Müser, H. E.

doi:10.1016/0040-6031(83)85081-3

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…The B-sample vessel is made of copper, and its walls are 0.4 mm. The vessel is about 35 mm in diameter and 65 mm in height, so the content of vessel is about 51.36 cm 3 . The multi-junction thermocouples between inner and outer adiabatic shields, the inner adiabatic shield, and the outer wall of sample vessel are connected to the temperature difference controller; thus, the automated adiabatic control is achieved.…”

Section: Methodsmentioning

confidence: 99%

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Heat Capacities of Five Mixtures and Emulsion of Buna-S

2006

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The heat capacities of five mixtures used in the synthetic process of buna-S and an emulsion of buna-S were measured by means of an automated adiabatic calorimeter developed for heat capacity from 240 K to 400 K. Two sample vessels (A and B) are used with the calorimeter. The A-sample vessel is made of silver for measurement at atmosphere pressure. The heat capacities of R-Al 2 O 3 (solid) and C 7 H 16 (heptane in liquid) were measured with the calorimeter using the A-sample vessel, and the deviation of heat capacities between our results and the literature amounts to 0.16 % for R-Al 2 O 3 and 0.28 % for C 7 H 16 . The B-sample vessel is made of copper for measurement at pressures up to 0.2 MPa. The calorimeter with the B-sample vessel was verified by measuring heat capacities of water, and the maximum relative difference with literature values is 0.33 %.

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Section: Methodsmentioning

confidence: 99%

“…The measurement of heat capacity of gases and liquids is more difficult than that of solids because their heat capacities depend significantly on temperature and pressure. There are many known calorimeters − developed for measuring the heat capacity of fluids.…”

Section: Introductionmentioning

confidence: 99%

Heat Capacities of Five Mixtures and Emulsion of Buna-S

2006

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“…All investigations were performed using a fully automatized adiabatic vacuum calorimeter [21]. The high performance achieved and long-term stability of the calorimeter result mainly from the excellent temperature regulation of the adiabatic shields and the 2. high temperature resolution.…”

Section: Methodsmentioning

confidence: 99%

A reinvestigation of the hypersonic properties and the specific heat capacity of PMMA around the quasi-static glass transition II. High performance caloric investigations

Frühauf

Helwig

Müser

et al. 1988

Colloid & Polymer Sci

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To continue dynamic cp measurements in the range of smallest temperature rates and non-linear thermal relaxation investigations into the linear range, simultaneous ep and thermal relaxation measurements were carried out in an adiabatic vacuum calorimeter, using the pulse heating method. The rate-dependent % behaviour, known from dynamic measurements, does not continue at small temperature rates. This is confirmed by the relaxation process which is observed. The results suggest an extended interpretation of the glass transition in atactic polymethylmethacrylate (PMMA).

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