文章摘要
Research on Properties of High Temperature Tear Resistant CNTs/FKM Composites for Sealing System of Shield Machine Main Drive
Received:January 24, 2024  Revised:February 28, 2024
DOI：10.12136/j.issn.1000-890X.2025.12.0905
Key Words: shield machine；sealing system for main drive；high-temperature tear strength；CNTs；FKM；seamless segmental vulcanization
Author NameAffiliationE-mail
JI Meiqin* 北京橡胶工业研究设计院 103524679@qq.com 
DING Panpan 北京橡胶工业研究设计院  
ZHANG Bin 北京橡胶工业研究设计院  
WANG Yongwei 北京橡胶工业研究设计院  
ZHAO Tianqi 北京橡胶工业研究设计院  
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Abstract:
      Targeting the sealing system of large-diameter shield machine main drive，the properties of high temperature tear resistant carbon nanotube（CNTs）/fluororubber（FKM）composites applicable to the seamless segmental vulcanization method were researched.The results showed that with the increase of CNTs amount，the Mooney viscosity，FL and Fmax of the composite increased，the t10 and t90 were prolonged，leading to worse processability，and the Shore A hardness，tensile strength，100% modulus，tear strength and high-temperature（100 ℃）tear strength increased，the elongation at break decreased.Additionally，the CNTs exhibited random orientation and uniform dispersion in the rubber matrix，and it had good compatibility with FKM.There was no significant difference in strength between the segmental vulcanized joint part and the non-joint part of the seal ring of the shield machine main drive.Overall，the suitable CNTs amount in the CNTs/FKM composite for the sealing system of the shield machine main drive was 1 phr.
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