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Studies on the effect of movement during the cure on the mechanical properties of a silicone building joint sealant
Author(s) -
White C.C.,
Hunston D.L.,
Williams R.S.
Publication year - 2010
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21518
Subject(s) - sealant , silicone , materials science , curing (chemistry) , composite material , forensic engineering , engineering
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 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 days. At 10 h of cure, enough crosslinking occurred before 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. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers