In this study, changes in the characteristics of O-rings and a blended fuel (ADD-BJF) consisting of bio-jet fuel and petroleum-based jet fuel (Jet A-1) were analyzed. Nitrile butadiene rubber (NBR) and fluorocarbon rubber (FKM-1, 2) were used as the experimental O-rings. For all experimental O-rings, at the beginning of storage after contact with ADD-BJF the compression set value tended to increase sharply, but there was no significant change thereafter. In particular, the compression set value of NBR stored for 2 months increased by 12.1% when stored at 25 °C and 88.1% at 100 °C. These results indicate that NBR is more affected by the storage temperature than FKM-1 and FKM-2. In addition, the tensile strength and elongation of the FKM-1 and FKM-2 did not change with storage conditions, but for the NBR stored at 100 °C they decreased with storage time. The ignition delay time of aged ADD-BJF after contact with the O-ring increased by about 10% at the beginning of storage and then tended to increase modestly. To interpret these results, Gas chromatography-mass spectrometer (GC/MS) analysis was performed and it indicated that the composition ratio of the aged ADD-BJF had changed.

中文翻译：

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加速老化对生物喷气燃料和接触弹性体的影响

在这项研究中，分析了 O 形环和由生物喷气燃料和石油基喷气燃料 (Jet A-1) 组成的混合燃料 (ADD-BJF) 的特性变化。丁腈橡胶 (NBR) 和氟碳橡胶 (FKM-1, 2) 用作实验 O 形圈。对于所有实验 O 形圈，在与 ADD-BJF 接触后的储存开始时，压缩永久变形值趋于急剧增加，但此后没有显着变化。特别是NBR在25℃下储存2个月的压缩永久变形值提高了12.1%，在100℃下提高了88.1%。这些结果表明，与 FKM-1 和 FKM-2 相比，NBR 受储存温度的影响更大。此外，FKM-1 和 FKM-2 的拉伸强度和伸长率不随储存条件而变化，但是对于储存在 100 °C 下的 NBR，它们会随着储存时间的延长而减少。老化的 ADD-BJF 与 O 形圈接触后的点火延迟时间在储存开始时增加了约 10%，然后趋于适度增加。为了解释这些结果，进行了气相色谱-质谱仪 (GC/MS) 分析，结果表明老化的 ADD-BJF 的组成比发生了变化。