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Unveiling the impact of organic phase aging on the long-term damping capacity of cement-styrene butadiene rubber composites.
- Source :
-
Construction & Building Materials . Jul2024, Vol. 437, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Given the crucial role of cement-styrene butadiene rubber (SBR) composites in the application of damping structural materials, their long-term damping performance needs to incorporate a focused examination of organic phase aging. This study investigated the changes in the dynamic mechanical properties of these composites subjected to thermo-oxidative and ultraviolet aging, and explored the damping degradation mechanisms specific to SBR. The results demonstrated a significant reduction in the damping capability of the composites under aging, exceeding 19.5 %, 33.9 %, and 46.0 % after 1, 2, and 4 years of service, respectively. The decrease is attributed to the alteration in the molecular structure of SBR, which includes the oxidation of the α-H double bond to a hydroxyl group, followed by a dehydrogenation reaction leading to the formation of aldehyde. Furthermore, the study utilized a three-element standard solid model to elucidate the frequency-dependent dynamic mechanical properties of the cement-SBR composites. • The dynamic mechanical properties of cement-SBR composites were monitored under aging processes. • The aging mechanism of SBR polymer was investigated under aging processes. • A three-element standard solid model was proposed to elucidate the dynamic mechanical properties of the cement-SBR composites. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYBUTADIENE
*DAMPING capacity
*MOLECULAR structure
*DOUBLE bonds
*HYDROXYL group
Subjects
Details
- Language :
- English
- ISSN :
- 09500618
- Volume :
- 437
- Database :
- Academic Search Index
- Journal :
- Construction & Building Materials
- Publication Type :
- Academic Journal
- Accession number :
- 177905711
- Full Text :
- https://doi.org/10.1016/j.conbuildmat.2024.136916