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DSC在潜在危险评估中的应用
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Differential scanning calorimetry (DSC) is an analytical technique which measures the heat flow into or out of a material as that material is exposed to a controlled thermal profile. DSC provides both qualitative and quantitative information about material transitions including glass transitions, crystallization, curing, melting and decomposition. For several of these transitions, DSC provides not only transition temperatures and a measure of the heat involved, but also provides information about the rate of reaction/decomposition (i.e., kinetics information) as well as related characteristics such as hazards potential. Because DSC kinetics are based on dynamic heating rate measurements and because the typical sample size is small (1-5 mg), the results obtained from DSC should be used in combination with larger scale tests and other tests which provide complementary information (e.g., pressure build-up and vent sizing) to gain a more complete perspective of a material’s hazards potential. Nevertheless, DSC is still very useful for rapidly comparing and/or screening potentially hazardous materials. |
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2017-03-01 11:16:15, 310.16 K
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