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BS ISO 19935-2:2020

BS ISO 19935-2:2020

$142.49

Plastics. Temperature modulated DSC – Measurement of specific heat capacity cp

Published By Publication Date Number of Pages
BSI 2020 24
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This document establishes a method for measurement of specific heat capacity, cp, using temperature modulated differential scanning calorimetry.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Temperature modulation, T(t)
4.2 Scanning rate
4.3 Heat flow rate, Φ(t)
10 5 Principles of determination of specific heat capacity with temperature modulated DSC
5.1 General
5.2 Specific heat capacity with no processes
5.3 Reversing and non-reversing specific heat capacity
5.4 Step scan method
5.5 Multiple frequencies
6 Apparatus and materials
6.1 General
6.2 Temperature control of the modulated differential scanning calorimeter
11 7 Calibration
7.1 General
7.2 Calibration of modulation amplitude
7.3 Calibration of phase
8 Procedure
8.1 General
12 8.2 Calculation of the specific heat capacity
8.3 Examples of the results
8.3.1 Modulated heat flow rate and scanning rate of modulation
13 8.3.2 Determination of specific heat capacity
14 9 Precision and bias
15 10 Test report
16 Annex A (informative) Example of the cp values of polystyrene (PS)
18 Annex B (informative) Example of the calibration constant K(ω) determined with the literature values of α-Al2O3[3]
19 Annex C (informative) Example of a reversing heat flow rate curve based on a modulated heat flow rate curve and a comparison with the specific heat capacity
20 Annex D (informative) Example of determination of specific heat capacity based on a multifrequency modulated heat flow rate curve
22 Bibliography

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BS ISO 19935-2:2020
$142.49