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ii)龟裂发生时间测定法是根据龟裂发生的时间进行评价的方法。测定时先将试验槽调整到规定的臭氧浓度和试验温度,然后将试样安装在试验槽内开始试验。每2、4、8、24、48、72和96小时观察试验槽内的试样,分别记录确认每个拉伸应变条件发生龟裂的时间。96小时以后根据需要确定适宜的时间。对3个试样分别记录开始龟裂所观察的时间。
ii) Cracking occurrence time measurement method is based on the time of occurrence of cracking method. First test when the test tank adjusted to the specified ozone concentration and test temperature, and then the sample installed in the test tank to start the test. The samples in the test cell were observed every 2, 4, 8, 24, 48, 72 and 96 hours and the time to confirm the occurrence of cracking in each tensile strain condition was recorded separately. 96 hours after the need to determine the appropriate time. The time taken for the beginning of cracking to be recorded on each of the three specimens was recorded.