Which is the peak corresponding to glass transition temperature in the DSC graph endo up?

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Which is the peak corresponding to glass transition temperature in the DSC graph endo up?

out of the endothermic peaks which is the glass transition temperature

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I did DSC calorimetry of solid sample. dsc endo up. But another up peak is observed before melting peak(at correct melting point) why two up peaks ?

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I did DSC calorimetry of solid sample. dsc endo up. But another up peak is observed before melting peak(at correct melting point) why two up peaks ?

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V R Arun Prakash

Hi,

Your graohs are quit confusing. But anyway i could say that fir graph. Better try with NETZACH German machines

1-62C

2- 33C

3- 75C

Lets verify with other researchers what they say.

Best

Elham Jafarigol

Can you share the orginal pdf drived from your analyze machine? This one is so unclear. If you share that maybe i can help.

Abdul Al Lafi

the Tg does not show up as peak, but it is a step change. i.e. a change like the one next the numbers in your graph.

all the best

you can try take the first derivative of your DSC curves, then Tg will appear as a peak.

Aboothahir Afzal

thanks for your answers