文章摘要
Study on Variations of Properties of HNBR Compounds for Stator of Screw Pump Aged in Crude Oil
Received:September 07, 2022  Revised:September 07, 2022
DOI：10.12136/j.issn.1000-890X.2024.02.0095
Key Words: HNBR；aging；tensile property；compressive stress-strain；stator of screw pump
Author NameAffiliationE-mail
ZHANG Zicheng Nanjing Tech University zzc01232022@163.com 
WANG Chao Nanjing Tech University  
LIANG Gang Nanjing Tech University  
ZHAO Wenjun Nanjing Tech University  
TAN Jinzhu* Nanjing Tech University tjznjut@njut.edu.cn 
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Abstract:
      The variations of the properties of hydrogenated nitrile rubber（HNBR） compounds for the stator of screw pumps aged in crude oil were studied.The results showed that with the prolongation of the aging time，the Shore A hardness of the HNBR compound aged in crude oil at 25 ℃ first decreased and then increased，and the loss factor（tanδ） decreased.The Shore A hardnesses and tanδ of HNBR compounds aged in crude oil at 60 and 100 ℃ increased.The tensile strengths and tear strengths of HNBR compounds aged in crude oil at 25，60 and 100 ℃ decreased.The elongations at break of HNBR compounds aged in crude oil at 25 and 60 ℃ decreased，and the compression sets first decreased and then increased.The elongation at break and compression set of HNBR compound aged in 100 ℃ crude oil increased.With the increase of the aging temperature and the prolongation of the aging time，the compressive stress of the HNBR compound at 25% compressive strain decreased.Compared to the aging time，the aging temperature had a significant impact on the compressive stress of HNBR compounds.
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