GB/T 7762-2003 in English

《GB/T 7762-2003硫化橡胶或热塑性橡胶 耐臭氧龟裂 静态拉伸试验》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了硫化橡胶或热塑性橡胶在静态拉伸应变条件下，暴露于含一定浓度臭氧的空气中和在规定温度且无光线直接影响的环境中进行的耐臭氧龟裂的试验方法。本标准是对GB/T 7762-1987的修订。

This standard specifies a method for the determination of resistance of vulcanized or thermoplastic rubbers to cracking when exposed, under static tensile strain, to air containing a definite concentration of ozone and at a definite temperature in circumstances that exclude the effects of direct light.
The relative ozone resistance of different rubbers can vary markedly according to 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 may be quite different owing to the effects of size and the type and magnitude of deformation.
Explanatory notes on the nature of ozone cracking are given in Appendix A.

Foreword I
1 Scope
2 Normative References
3 Definitions
4 Principle
5 Apparatus
6 Test Piece
7 Conditioning
8 Test Conditions
9 Test Procedure
10 Result Expression
11 Test Report
Appendix A (Informative) Explanatory Notes
Appendix B (Informative) Determination Method for Ozone Concentration - Iodometry