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dc.creatorKeshavaraj, Ramesh
dc.date.available2015-01-26T14:09:44Z
dc.date.issued1992-12
dc.identifier.urihttp://hdl.handle.net/2346/60707
dc.description.abstractThe changes in physical properties of three different commercial silicone sealants used in structural glazing applications were monitored as a function of various environmental and climatic aging factors. These variables included, exposure to solar radiation(UV) and simulated rainfall in which the pH of the water ranged from 3 to 11. The extremes of the pH range represent recorded values for acid rain(pH=3) and basic cleaning solutions(pH=11), respectively. A second portion of the study involved contacting test coupons simultaneously with simulated rain and high levels of gaseous ozone. The experimental tensile tests coupons were cut from sheets of DC-790, DC-995 and DC-983. An Instron tester was used to measure the changes in engineering properties such as moduli and tensile strengths of the test samples as a function of time of exposure to the different variables. Unexposed samples, kept at ambient laboratory conditions, were used as the control.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.subjectSilicone rubber -- Testing
dc.subjectSealing compounds -- Testing
dc.subjectWeathering of buildings -- Testing
dc.titlePhysical property changes in commercial structural silicone sealants due to weatheringen_US
dc.typeThesis
thesis.degree.nameMaster of Science
thesis.degree.levelMasters
thesis.degree.disciplineChemical Engineering
thesis.degree.grantorTexas Tech University
thesis.degree.departmentChemical Engineering
dc.contributor.committeeMemberVallabhan, C. V. G.
dc.contributor.committeeMemberNarayan, Raghu Subramani
dc.contributor.committeeChairTock, Richard W.
dc.rights.availabilityUnrestricted.


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