AKTS advanced thermal analysis software - dynamic mechanical analyzer

Cautions

1) Since the diffusivity of the evolved gas in the carrier gas influences of the shape of the EGA-curves, it is necessary to use such a carrier gas in which the diffusivity of the evolved gas is low.

2) Since the carrier gas flow rate influences the time lag between the measured DTG and EGA curves, a minimal total gas flow rate has to be determined above which no significant difference between input (DTG) and output signal (EGA curves) can be observed.

Therefore, the minimal required carrier gas flow rate becomes larger with:

higher diffusivity of the evolving species in the carrier gas
larger distance between the thermoanalyzer and EGA system
larger volume of the thermoanalyzer chamber

However, a high carrier gas-flow rate results in a decrease in the evolved gas intensity recorded by the EGA system.