Dear Experts,
I recently conducted differential scanning calorimetry (DSC) tests on a bicomponent polyester and observed two distinct melting point curves: the first at 70 °C and the second at 250 °C. However, the manufacturer's specification sheet indicates that the first melting point should be 110 °C.
Could you provide insights into the potential reasons for this discrepancy in melting point results? Additionally, are there any factors I should consider that might affect the accuracy of the DSC measurements or the interpretation of the data?
Thank you for your assistance.
Dear Md Toufiqur Rahman, to consider is water content and temperature scanning rate. The lowering of melting temperature most probably is due to the plasticizing effect of water. So, better to do repeated scan and take the result of the repeated cycles. Repeated scan dry the sample from water. My Regards
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