BS ISO 1431-1:2012
$142.49
Rubber, vulcanized or thermoplastic. Resistance to ozone cracking – Static and dynamic strain testing
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 26 |
This part of ISO 1431 specifies procedures intended for use in estimating the resistance of vulcanized or thermoplastic rubbers to cracking when exposed, under static or dynamic tensile strain, to air containing a definite concentration of ozone and at a definite temperature in circumstances that exclude the effects of direct light.
Great caution is necessary in attempting to relate standard test results to service performance since the relative ozone resistance of different rubbers can vary markedly depending on the conditions, especially ozone concentration and temperature. In addition, tests are carried out on thin test pieces deformed in tension and the significance of attack for articles in service can be quite different owing to the effects of size and of the type and magnitude of the deformation. Explanatory notes on the nature of ozone cracking are given in Annex A.
Reference and alternative methods for determining the ozone concentration are described in ISO 1431-3.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | CVP_Secretariat_Loca |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Principle 5 Apparatus (see Figure 1) 5.1 Test chamber |
| 9 | 5.2 Source of ozonized air |
| 10 | 5.3 Means of adjusting the ozone concentration 5.4 Means of determining the ozone concentration 5.5 Means of adjusting the gas flow 5.6 Mounting test pieces for static strain testing |
| 11 | 5.7 Mounting test pieces for dynamic strain testing 6 Calibration 7 Test pieces 7.1 General |
| 12 | 7.2 Wide test piece 7.3 Narrow test piece 8 Conditioning 8.1 Conditioning in the unstrained state |
| 13 | 8.2 Conditioning in the strained state (for static strain testing only) 9 Test conditions 9.1 Ozone concentration 9.2 Temperature |
| 14 | 9.3 Relative humidity 9.4 Maximum elongation 10 Static strain testing 10.1 General 10.2 Procedure A 10.3 Procedure B 10.4 Procedure C |
| 15 | 11 Dynamic strain testing 11.1 General 11.2 Continuous dynamic exposure 11.3 Intermittent dynamic exposure |
| 16 | 12 Expression of results 12.1 Procedure A 12.2 Procedure B 12.3 Procedure C (for static tests only) |
| 17 | 13 Test report |
| 19 | Annex A (informative) Ozone cracking — Explanatory notes |
| 20 | Annex B (normative) Calibration schedule |
| 22 | Annex C (informative) Ozone cracking — Rating scales Ozone cracking — Rating scales |
| 23 | Bibliography Bibliography |
