The Reaction of Perfluoropolyalkylether Oil with FeF3, AlF3, and AlCl3at Elevated Temperatures
作者:
DavidJ. Carré,
JonathanA. Markowitz,
期刊:
A S L E Transactions
(Taylor Available online 1985)
卷期:
Volume 28,
issue 1
页码: 40-46
ISSN:0569-8197
年代: 1985
DOI:10.1080/05698198508981592
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The interaction of perfluoropolyalkylether (PFPE) oil with ferric fluoride (FeF3) and other Lewis acids at elevated temperatures under inert atmosphere was investigated to determine whether the reaction results in lubricant degradation. At 35°C, ∼25°C below the onset of thermal degradation, PFPE'S reaction with FeF3yields acyl fluoride and ketone degradation products and also a decrease in the oil's number-average molecular weight. In the presence of small quantities of water, the acyl halide products hydrolyze, resulting in carboxylic acids. The oil's reaction with aluminum fluoride at 350°C and aluminum chloride at 200°C also causes it to degrade measurably. The results indicate that PFPE oil can degrade at estimated bearing asperity contact temperatures in the presence of FeF3.
点击下载:
PDF (396KB)
返 回