Pressurization experiments were performed in a cylindrical
compression chamber with an inner spherical shaped cover and bottom that was
equipped with a pressure gauge to monitor the chamber pressure,
which was submerged in a thermostatic bath supplied by a
Refrigerated/Heating circulator F38-EH for control
of the temperature. A type K thermocouple (NiCr/NiAl) was
fitted in the cylinder cover for temperature detection on the
external surface of the sample bag.
Pressurization was realized by connecting the pressure chamber
to a motorized French Press (AMINCO, Silver Spring, MA, USA) the
cylinder of which is fitted with a 3/4 inch piston and employed as
external pressure intensifier using proper ethanediol/water mixtures
as pressure transmitters