Thermal measuring and testing – Thermal testing of a nonthermal quantity – Expansion or contraction characteristics
Patent
1987-12-07
1989-06-06
Cuchlinski, Jr., William A.
Thermal measuring and testing
Thermal testing of a nonthermal quantity
Expansion or contraction characteristics
374 51, 374 53, 73866, 73813, G01N 318, G01N 2502
Patent
active
048377767
ABSTRACT:
In a process for measuring the variations in volume, especially shrinkage measurements in duroplastics during the hardening, the material to be measured is acted upon by such a pressure that a fully homogeneous test piece is obtained without any fractures or blisters. Simultaneously and independently from one another, the impinging pressure, the pressure exerted through the test piece on the floor, the temperature in the test piece and in its environs and the volume of the test piece are measured under non-isothermal conditions and fed into a digital unit. The device for carrying out this process has a measuring cylinder (5) with a measuring bore (12) and a measuring piston (10) which fits into this measuring bore and is acted upon by pressure, as well as a displacement detector (9) attached to the measuring piston, a temperature probe (14) in the measuring cylinder, a temperature probe (16) in the measuring bore for measuring the temperature in the test piece, a pressure gauge in the compressed air line, a pressure receiver (18) located at the end of the measuring bore which is opposite to the measuring piston and a heating means (13) for the measuring cylinder.
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Zoller, et al., "Apparatus For Measuring Pressure-Volume-Temp. Relationships of Polymers to 350.degree. C. And 2200 kg/cm.sup.2 " Rev. Sci. Instr. vol. 47, No. 8, pp. 948-952, 8-76.
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Ciba-Geigy Corporation
Cuchlinski Jr. William A.
Falber Harry
Will Thomas B.
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