Molecular Relaxations, Molecular Orientation and the Friction Characteristics of Polyimide Films
作者:
RobertL. Fusaro,
期刊:
A S L E Transactions
(Taylor Available online 1977)
卷期:
Volume 20,
issue 1
页码: 1-14
ISSN:0569-8197
年代: 1977
DOI:10.1080/05698197708982812
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The friction characteristics of polyimide films bonded to metallic substrates were studied from 25 to 500 C. These results were interpreted in terms of molecular orientation and thermomechanical data obtained by torsional braid analysis (TBA). A large friction transition was found to occur at 40±10 C in a dry argon atmosphere (10 ppm H2O). It was postulated that the mechanical stresses of sliding transform or reorder the molecules on the surface into a configuration conducive to easy shear, such as an extended chain. The molecular relaxation which occurs in this temperature region appears to give the molecules the necessary freedom for this reordering process to occur. The effects of velocity, reversibility, and thermal prehistory on the friction properties of polyimide were also studied.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference held in Miami Beach, Florida, October 21–23, 1975
点击下载:
PDF (911KB)
返 回