文章摘要
Study on Thermal Oxidative Aging Behavior and Life Prediction of FKM and NBR
Received:June 29, 2025  Revised:June 29, 2025
DOI：10.12136/j.issn.1000-890X.2026.07.0503
Key Words: FKM；NBR；thermal oxidative aging；storage life；service life；prediction
Author NameAffiliationE-mail
LUO Hengyu* Northwest Rubber & Plastics Research & Design Institute Co., Ltd. 1678990123@qq.com 
LI Feijie Northwest Rubber & Plastics Research & Design Institute Co., Ltd.  
LI Junyu Sinopec Shanghai Research Institute of Petrochemical Technology Co.，Ltd  
LI Liang Northwest Rubber & Plastics Research & Design Institute Co., Ltd.  
LIANG Liqiang Northwest Rubber & Plastics Research & Design Institute Co., Ltd.  
LIU Qi Northwest Rubber & Plastics Research & Design Institute Co., Ltd.  
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Abstract:
      The thermal oxidative aging behavior of fluororubber（FKM） and nitrile rubber（NBR） compounds was studied，and the storage and service life were modeled and predictd.The results indicated that the thermal oxidative aging patterns of FKM and NBR compounds were similar，the compression set（CS）of both compounds increased with extended aging time and increased aging temperatures.Compared to FKM compound，the NBR compound was more susceptible to aging at higher temperatures.When the CS reached 10%，the storage critical time for FKM and NBR products at temperatures between 25 ℃ and 30 ℃ was approximately 4.55 and 2.55 a，respectively.For a designated storage life of 5 a for FKM product and 2 a for NBR product，the corresponding critical storage temperatures were 24.07 and 31.71 ℃，respectively.In terms of service life，under a 25 ℃ air atmosphere，the time required for the CS to reach 25% was 38.66 a for FKM product and 27.06 a for NBR product.Furthermore，under the premise of a 20 000 h service life，the critical maximum service temperatures for the CS to reach 50% were 82.58 ℃ for FKM product and 55.74 ℃ for NBR product.
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