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Modulated Differential Scanning Calorimetry (MDSC*) Q2000. MANUAL
 

Summary: Modulated Differential Scanning Calorimetry (MDSC*)
Q2000. MANUAL
In MDSC a more complex heating profile (temperature regime) is applied to the sample
than is used in conventional DSC (see WebPage introduction).
When to run MDSC?
- Always run a standard DSC at 10 ēC/min first.
- If a Tg is detectable and can be routinely analyzed, then you don't need to use
MDSC.
- If the Tg is hard to detect, or has an enthalpic recovery, then run MDSC.
- If melting process looks normal (single endothermic peak) and there is no
apparent crystallization as it is heated, then you don't need to run MDSC.
- However, if melt is not straightforward, or it is difficult to determine if
crystallization is occurring as the sample is heated, use MDSC.
- If you want heat capacity (Cp) ­ run MDSC.
The actual complex temperature/time profile in MDSC depends on three variables: (1)
underlying heating/cooling rate, (2) modulation period, (3) modulation temperature
amplitude.
Underlying Heating/Cooling Rate: 1-5 o
C/min. Slower heating rate than conventional
DSC are preferred to allow sufficient modulations during a thermal event. At least 4-5

  

Source: Akhmedov, Azer - Department of Mathematics, University of California at Santa Barbara

 

Collections: Mathematics