First-Order Transition of Poly amide

The DSC should be calibrated before analyzing the polymer. Calibration should be verified by using either indium or tin (Table 16.3). Temperature and heat values should be within normal ranges for the instrument [16,17] or at least within the precision and accuracy limits specified within Refs. 32 and 59. 

Use forceps to handle the sample pan and lid. Obtain the tare weight of a sample pan and lid (the type that can be hermetically sealed is not required). (Note Select pans with flat undistorted bottoms so that good contact with the cell platforms is assured.) 

Record the mass of the sample pan and lid to five significant figures. 

Add about 10 mg of polyamide or calibration standard to the sample pan and lid and weigh again. A powdered sample provides better thermal contact. 

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