DEAR BADRI, FIRST WHAT DO YOU MEAN WITH CONTRADICTORY CONCLUSIONS? IN TGA YOU CAN EVALUATE THE LOSS OF WEIGHT OF SAMPLE, AND MELTING POINT INDICATE THE TEMPERATURE WHICH THE MATERIAL CHANGE THE STATE FROM SOLID TO FLUID. SO IF YOU INDICATE WHAT IS THE CONTRADICTION, MAY BE THE ANSWER COULD BE MORE EXACT
Thank you for your reply. I can understand what you say. However, sometimes we can see decomposition before melting or no melting.
For example, the following paper discuss the TGA data based on the m.p., although sometimes they are in different ranges.
Article Luminescent coordination polymers of 2,2′-bipyrimidine and m...
Badri Z. Momeni There can be a good explanation to the observed difference. I came across this phenomenon several times. If your machines are well calibrated, then this can result from sample preparation and holder. In our company, DSC is usually measured in small ENCLOSED pans, whereas TGA is performed in bigger amount in an open pan, which is placed in nitrogen gas stream. Sometimes events happening in a closed pan are shifted by degrees/or tens of degrees.
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