SYMPOSIA PAPER
Published:
01 January 2010
STP48977S
Effect of Strain on the Modulus of Sealants Exposed to the Outdoors
SourceThe effects of applied strain on sealants exposed to outdoor weathering were examined for two sealant formulations, Sealants A and C. Both static and dynamic strain was applied to the sealants during the summer in a Gaithersburg, MD outdoor location. Both sealants exhibited a reversible change in equilibrium distance. Stress relaxation studies on all samples revealed that, for Sealant A, two mechanisms affected modulus change; exposure without applied strain increased the modulus while additionally applied strain decreased the modulus. Only one mechanism that decreased the modulus was found for Sealant C. A 7 % dynamic strain and a 25 % static strain were observed to produce equivalent modulus changes in both systems.
Author Information
White, Christopher, C.
National Institute of Standards and Technology, Gaithersburg, MD
Hunston, Donald
National Institute of Standards and Technology, Gaithersburg, MD
Tan, Kar, Tean
National Institute of Standards and Technology, Gaithersburg, MD
Related
Reprints and Permissions
Details
Developed by Committee: C24
Pages: 328–341
DOI: 10.1520/STP48977S
ISBN-EB: 978-0-8031-8408-4
ISBN-13: 978-0-8031-3426-3