A fast real time measurement system to track in and out of plane optical retardation/ birefringence, true stress, and true strain during biaxial stretching of polymer films Rev.

A differential technique has been used to measure the absolute effect of pressure on the emf of Chromel-Alumel and Pt-Pt10Rh thermocouples. The experiments were conducted in a solid pressure medium piston-cylinder apparatus to 35 kbar and 1000°C. Extrapolation of these data shows Chromel-Alumel to read as much as 28°C high at 50 kbar and 1200°C and Pt-Pt10Rh as much as 28°C low at 50 kbar and 2000°C. Graphs are presented which show correction voltage versus temperature for various pressures.

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