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|Author(s):||Christopher C. White; Donald L. Hunston; Sam Williams;|
|Title:||Studies on the Effect of Movement During the Cure on the Mechanical Properties of Building Joint Sealant|
|Published:||September 10, 2010|
|Abstract:||A novel sealant-testing device was used to continuously monitor the mechanical properties of a one part silicone sealant for movement cycles initiated from 10 h to 168 h after sample creation. These cure times fall between the proposed RILEM TC 139 technical recommendation of 5 min and the ASTM C719 standard of 21 d. Apparently, enough cross-linking occurred prior to testing such that neither the overall movement history of the sample nor the deformation step shapes affected subsequent curing of the sealant. A critical parameter for sealant performance appears to be the extent of cure at the onset of movement.|
|Citation:||Polymer Engineering and Science|
|Keywords:||Strain, Sealant, Movement during Cure, Exposure, ASTM, elastomer, rubber network|