BS ISO 23706:2020
$142.49
Plastics. Determination of apparent activation energies of property changes in standard weathering test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 26 |
This document describes a test method to determine the activation energy (Ea) of photochemical degradation reactions in accelerated weathering tests according to the Arrhenius model in the most comprehensive manner.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions |
| 10 | 3.2 Abbreviated terms 4 Principle |
| 11 | 5 Apparatus 5.1 General 5.2 Surface temperature measurement 6 Test specimens 7 Test method 7.1 Test conditions |
| 12 | 7.2 Test duration 7.3 Increased/decreased temperatures 7.4 Calculation of activation energy, Ea 7.4.1 Exposures at two different temperatures |
| 13 | 7.4.2 Exposures at two or more different temperatures 8 Exposure conditions 9 Procedure 9.1 General 9.2 Mounting the test specimens 9.3 Exposure 9.4 Measurement of radiant exposure |
| 14 | 9.5 Determination of changes in properties after exposure 10 Test report |
| 15 | Annex A (normative) Arrhenius concept |
| 18 | Annex B (informative) Examples |
| 22 | Annex C (informative) Effective temperature calculation |
| 23 | Annex D (informative) Potential contributions to the uncertainty budget |
| 25 | Bibliography |
