Knauss, W. G. and Kenner, V. H. (1980) On the hygrothermomechanical characterization of polyvinyl acetate. Journal of Applied Physics, 51 (10). pp. 5131-5136. ISSN 0021-8979 http://resolver.caltech.edu/CaltechAUTHORS:KNAjap80
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:KNAjap80
As a part of a program to understand the mechanisms of failure in time-dependent adhesion and film bonding, the creep compliance of polyvinyl acetate (PVAc) in shear has been determined both as a function of temperature and absorbed moisture. Volumetric expansion as a function of temperature or moisture takeup was also measured. We find that practically realizable changes in moisture content affect both the creep compliance and the swelling of PVAc to a degree comparable to that resulting from realistic changes in temperature. For example, the creep rates (histories) at corresponding times for PVAc subjected to 92% relative humidity storage are accelerated by approximately four orders of magnitude over those found for the dry material. Moreover, we find within reasonable experimental error that water concentration affects the time scale of creep like temperature through a concentration-dependent shift factor. An attempt is made at discussing the interrelation of temperature- and moisture-induced volume changes.
|Additional Information:||Copyright © 1980 American Institute of Physics. The authors wish to express their gratitude to the Air Force Office of Scientific Research (Lt. Col. J. Morgan), and the Jet Propulsion Laboratory (Dr. J. Moacanin) and the Department of Energy, who supported this work through Contracts F49620-77-C-005 1and 49-767-10002-0-3460, respectively. We also gratefully acknowledge the assistance of M. Sarbolouki of JPL for performing the liquid chromatography and I. Emri and L. Heymans of Caltech for conducting the measurements leading to Figs. 3 and 4, respectively.|
|Subject Keywords:||POLYVINYLS, DATA, HYGROSCOPICITY, THERMODYNAMIC PROPERTIES, MECHANICAL PROPERTIES, ACETATES, FAILURE, ADHESION, FILMS, BONDING, CREEP, TEMPERATURE DEPENDENCE, MOISTURE|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||13 Jun 2008|
|Last Modified:||26 Dec 2012 10:05|
Repository Staff Only: item control page