【国外标准】 Standard Test Method for Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry (DSC) (Withdrawn 2004)

1.1 This test method covers the determination of heat of fusion and heat of crystallization of polymers by differential scanning calorimetry. 1.2 This test method is applicable to polymers in granular form (below 60 mesh preferred, avoid grinding if possible) or to any fabricated shape from which appropriate samples can be cut. 1.3 The normal operating temperature range is from the cryogenic region to 600°C. 1.4 The values in SI units are to be regarded as the standard. Note 1-True heats of fusion can only be determined in conjunction with structure investigation and frequently specialized crystallization techniques are needed. Note 2-This test method may not be applicable to all types of polymers as written (see 6.6). Note 3-Uncertain radiation losses at temperatures higher than 400°C may affect the accuracy of results. Note 4- To date, there is no similar or equivalent approved ISO standard. 1.5 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.