Please answer me that Integral procedural decomposition temperature can be calculate for single heating rate in TGA and how can it be calculated.
To calculate IPDT, divide the thermogram to three sections (lower part: S1, beneath the TGA: S2, and upper part: S3) as shown in the attached image.
Then use ِDoyle equation as following:
IPDT= A*K*(Tf-Ti)+Ti
A=(S1+S2)/(S1+S2+S3)
K=(S1+S2)/S1
Please note that the experiment should be performed under an inert atmosphere.
Thank you so much sir for your detailed answer.well used for work.
Thenmozhi Karthikeyan : May i know for what purpose IPDT value should be calculated and interpreted?
Ali Nematollahzadeh : Sir, Can you please explain how to calculate the values of S1,S2 and S3?. It will be of great help.
Looking forward to your answers.
- Prabhu Palanichamy
To calculate the area S1, you should use a numerical integration method or simply fit a curve on the TGA data and integrate the resultant equation. For this, you may use Table Curve or Matlab software.
For S2, it is a rectangular limited to T-Ti and Wf-W0, so the area is (T-T0)*( Wf-W0).
S3 is the area of the green rectangular minus S1
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