This question is about the various temperatures in the graphs. how to calculate each enthalpy for different temperatures? Please introduce some references or methods.
Thank you
Hi Farzaneh,
To estimate enthalpy from DSC, refer to the similar solved issue https://www.researchgate.net/post/How_to_calculate_enthalpy_change_of_thermal_transitions_like_melting_crystallization_and_glass_transition_from_DSC_result
About TGA/DTA, you may refer to https://www.researchgate.net/post/How_to_calculate_enthalpy_from_DTA_Differential_Thermal_Analysis
Finally, an application note of interest by following https://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=16&cad=rja&uact=8&ved=0ahUKEwj1s_iV0efTAhWBbBoKHVQKCIEQFgiAATAP&url=https%3A%2F%2Fwww.researchgate.net%2Ffile.PostFileLoader.html%3Fid%3D569352e560614bbc908b45a8%26assetKey%3DAS%253A316603604897793%25401452495589574&usg=AFQjCNHWaJGVgiIIpnhp29c_xQLK25R79Q
Regards
Dear MS Sabbagh
As far as I know, DSC is the best way for calculating First or Second Order phase transition enthalpy such as melting, crystallization or glass transition. I mean that with coarse thermal analysis like TGA, the objective is not to determine phase transition or enthalpy but the main objective of DSC is to find phase transitions and enthalpy.
- It is also urgent to be mentioned that if you are dealing with biopolymers, for determining Tg, it is better to use DMTA instead of DSC because DMTA is more sensitive in this case. Sometimes DSC does not give a true and clear response for some biopolymers that is maybe related to their semi crystalline (partial crystalline) structures.
there is some link here I attach:
http://pslc.ws/macrog/dsc.htm
https://www.jove.com/science-education/5559/using-differential-scanning-calorimetry-to-measure-changes-in-enthalpy
I hope it is helpful
Wish you all success
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