Determination of the Thermal Stability of Fluids by Tensimetry: Instrumentation and Procedure

Authors

Larry S. Helmick, Cedarville UniversityFollow
William R. Jones

Document Type

Article

Publication Date

1990

Journal Title

Tribology Transactions

Volume

33

Issue

4

First Page

519

Last Page

528

Abstract

A computerized tensimeter and experimental procedure for determination of the thermal decomposition temperature (T_d) of perfluoroalkylethers have been developed and tested. Both the apparatus and the procedure are described in detail. Results of testing with bis (2-ethylhexyl) phthalate and trimethylolpropane triheptanoate demonstrate that the reciprocal of the decomposition temperature is a linear function of the logarithm of the gas volume/heated liquid volume ratio. The T_d obtained for each compound at a gas volume/heated liquid volume ratio of one was similar to the value previously reported using an isoteniscope technique. Results of testing with a polymer of hexafluoropropylene oxide demonstrate that this instrument and procedure can be used to determine the T_d of perfluoroalkylethers.

Recommended Citation

Helmick, L. S. (1990). Determination of the Thermal Stability of Fluids by Tensimetry: Instrumentation and Procedure. Tribology Transactions, 33, 519-528.