| Author(s): |
Christopher C. White; Donald L. Hunston; Kar Tean Tan; |
| Title: |
Effect of Strain on the Modulus of Sealants Exposed to the Outdoors |
| Published: |
March 11, 2009 |
| Abstract: |
The 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. |
| Citation: |
Journal of ASTM International |
| Volume: |
6 |
| Issue: |
2 |
| Pages: |
10 pp. |
| Keywords: |
Sealant; Strain; Modulus; Outdoor Weathering; Characterization |
| Research Areas: |
Building Materials |
