文章摘要
Failure Analysis of Cracking of NR Bushing for Automobile
Received:March 20, 2020  Revised:March 20, 2020
DOI：10.12136/j.issn.1000-890X.2020.09.0701
Key Words: NR；bushing for automobile；failure；cracking；appearance；component analysis；thermo-oxidative aging
Author NameAffiliationE-mail
WANG Lijuan* Shenzhen Meixin Analysis Technology Co.,Ltd wanglijuan@mttlab.com 
YANG Zhenying Shenzhen Meixin Testing Technology Co.，Ltd  
WEI Qiao Shenzhen Meixin Analysis Technology Co.,Ltd  
WANG Jiazi Shenzhen Meixin Testing Technology Co.，Ltd  
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Abstract:
      Through appearance observation，surface element analysis，thermogravimetric analysis，density determination and organic component detection of pyrolysis gas chromatography-mass spectrometry，the cause of cracking failure of natural rubber（NR） bushing for automobile was analyzed.The results showed that the cracking of the NR bushing for automobile was caused by thermo-oxidative aging.Compared with the sample without cracking，the surface oxygen element content of the cracked sample increased，the thermal decomposition temperature increased，the density increased，and the phenolic antioxidant was disappeared.
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