In DSC heating rate was 10°C/Min in the range of 70-150°C. The heat flow vs. temperature curve was almost flat. But after the run, when lid was broken it was observed that the sample was melted within this temperature range. The same observation of melting was observed at around 105°C in melting point apparatus. How this is happening in DSC?
Melting of the sample could have occurred after the measurement was completed as a result of overheating the sample. Try to analyze the sample at different heating rates or reduce the sample mass.
Thank you for your suggestion Dr. Tomasz. I have already attempted all possible ways to overcome the issue, but nothing works particularly for this sample.
Hi
Van you please share the DSC therogram what you have. We may have possible solution
Best
What were the masses of samples in your experiments? sometimes the heat of melting is very small and you can register it on DSC only when you increase both the mass of the sample and heating rate.
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