Kinetic investigations on model substances

1 DSC experiments according to ASTM E 698-79 heat of vaporization of n-alkanes 

Pyrolysis experiments in an inert atmosphere on the series of -alkanes reveal that even those with the longest carbon chains and thus the highest molecular weights evaporated more or less completely in the flow of argon (at 1 bar pressure) (see chapter 3.2.1) [3-12]. Experiments performed at different heating rates demonstrate the expected shift of the peak 

Shift of Peak Temperatures at Different Heating Rates p (5, 10, and 20 K/min) 

Comparison of the curve derived from DSC data with the curve derived from DTG data according to ASTM E 698-79 shows that identical values are found using both methods of measurement (Fig. 3-55). The deviation at carbon-numbers 12 is caused by uncertainties in the determination of the DTG maximum temperatures for low-boiling substances. 

Increase of the pressure of the inert gas from 1 to 10 bar at constant flow rates causes a rise of the peak maximum temperatures. A strong linear correlation exists between temperature and pressure (Fig. 3-56)  

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