DSC 1 Differential Scanning Calorimetry –DSC compares the thermal response of a sample to that of...
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Transcript of DSC 1 Differential Scanning Calorimetry –DSC compares the thermal response of a sample to that of...
DSC
1
• Differential Scanning Calorimetry– DSC compares the thermal response of a sample to
that of an inert reference.
http://www.tainstruments.com/pdf/brochure/2012%20DSC%20Brochure%20r1.pdf
DSC
2
• Power Compensated
• Heat flux
http://www.evitherm.org/default.asp?lan=1&ID=982&Menu1=982
DSC
3 Principles of Thermal Analysis and Calorimetry, P.J. Haines et al., Royal Society of Chemistry, 2002http://www.colby.edu/chemistry/PChem/lab/DSCPETE.pdf
Kinetic Modeling
4
• Isothermal Scanning
• nth order vs. autocatalytic models
• Activation energy
Sheng, et al. J. Therm. Anal. Cal., 93, 2008
1 1E
nRTcat
dA e K
dt
Exothermic polymerization peaks
𝛼𝑚
y = -mx + b
Kinetic Modeling
5
• Dynamic Scanning
• Isoconversional Methods– Kissinger
– Ozawa
– Friedman
Sheng, et al. J. Therm. Anal. Cal., 93, 2008
1 1E
nRTcat
dA e K
dt
𝛼𝑚