Differential Scanning Calorimetry on plastic

AI Thread Summary
The melting and crystallization peaks of plastics do not align in DSC scans due to differences in thermal behavior, similar to metals. Crystallization typically occurs at a lower temperature than melting, which is a normal phenomenon. This discrepancy is influenced by the material's state of lowest energy. Factors such as cooling rate can also affect these thermal transitions. Understanding these principles is essential for analyzing the thermal properties of plastics.
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Hi

Is there anyone, that can explan why the melting and crystallization peak of a plastic don not have same position in DSC scan?
 
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Hi there
Well i don`t know if it is the same for plastic as for metals but for metals this a normal effect if you mean that it crystalizes at a lower temperature then it melts.

I don`t know the physical reason for it perfectly but it has to do with the state of lowest energy. Thought it can be influenced by some parameters like cooling rate and such.
 

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