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Showing 1 to 20 of 57 for “"sealant"”.
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Behavior of fillet sealant joints
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1989.
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Measuring and predicting sealant adhesion
Current sealant test methods do not lend themselves well to the measurement and prediction of sealant performance. T he objective of this work was to demonstrate that measurement of sealant material properties as a function of temperature and relative humidity for a specific sealant and substrate …
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Characterization of polyphenoxy-ethylphenoxyphosphazene-bulk sealant applications
… morphologies and glass transitions. Possible sealant applications of these materials are apparent and have yet to be realized. These will be the focus of this thesis. The objective of this research was to characterize polyphenoxy-ethylphenoxy-phosphazene in terms of three bulk properties to …
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Flexural Strength of a Pit and Fissure Sealant Containing Microcapsules
… have on the flexural strength of pit and fissure sealant formulations. Pit and fissure sealants that contained microcapsules were incorporated into formulations at 5 w/w% of microcapsules (2 w/w% of 5.0 M Ca(NO3)2; 2 w/w% of 0.8 M NaF; 1 w/w% of 3.0 M K2HPO4) were added to pit and fissure sealant …
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Autologous Fibrinogen Purification and Concentration For Use in Fibrin Sealant
<p>Fibrinogen concentrates are used widely as a sealant during and after surgery to reduce blood loss. Commercially available fibrin sealants are made from pooled human blood, which carries the risk of blood-borne diseases, and are expensive. These concerns have brought to focus the need for …
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Handling Characteristics and Colloidal Stability of an Orthodontic Sealant Containing Microcapsules
… cavitation. The application of an orthodontic sealant would act as a physical barrier between the bracket and superficial enamel. The sealant formulations contain microcapsules capable of releasing bioavailable remineralizing ions. The addition of the novel ion-releasing microcapsules within …
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Biodegradable Polymeric Ion Releasing Fillers Effect on Pit and Fissure Sealant Properties
… of cure, flexural strength, and viscosity of a sealant. Methods: For all formulations the continuous phase was 65w/w% bisGMA and 35w/w% TEGMA. Camphorquinone and ethyl dimethylaminobenzoate were used as a photoinitiator at 1w/w% of the formulation. OX50 was used as the fumed silica at 3w/w% of …
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Pathogenesis of post surgical adhesions and prevention using a novel fibrin sealant
… with VivostatTM System Derived (novel) Fibrin Sealant significantly reduced the formation of PSAs with mean PSA reduction of 80% for the rabbit uterine horn abrasion model, from 3 separate studies; 83% for the pig stomach/colon/caecum abrasion model, from 2 separate studies; 80% for the rat …
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Adhesion Mechanisms of Bituminous Crack Sealant to Aggregate and Laboratory Test Development
… guidelines for the selection of hot-poured crack sealant, the blister test may be used to estimate the optimum annealing time, in addition to IFE determination.
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Investigating the use of different types of sealant materials for cement remedial applications
… and micro-annuli in oil and gas wells. The sealant material that can also be used in the wells that are used for geologic storage of carbon dioxide CO<sub>2</sub>. Evaluating the sealant material is critical to improve the zonal isolation of the wells, which would lead to safer operations. …
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Test Development and Material Characterization of Hot Poured Crack Sealant at Low Temperature
… to the mechanical characterization of the sealant material, microstructure of the sealants were also investigated by confocal laser scanning microscopy (CLSM), environmental scanning electron microscopy (ESEM), gel-permeation chromatography (GPC), Fourier-transform infrared spectroscopy …
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Polyurethane Sealant to Mitigate Crack Effects in Glass-to-Metal Sealed Underwater Connectors
… In this thesis, we propose and test a sealant to overcome limitations associated with internal cracks. The need for a sealant was identified following a series of experimental tests simulating environmental, operational, and human handling conditions. Analysis shows there is an …
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Mechanistic service life prediction of rigid pavement joint sealant: a new laboratory testing technique
A new method to evaluate the performance of sealants used in rigid pavement joints was developed. A special fixture, attached to a servo-hydraulic testing machine, was designed to transfer applied cyclic shear deflection to a sealant sandwiched between two 51 x 51 x 51 mm portland cement concrete …
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Synthesis and Characterization of Nitrile Containing Polysiloxanes and Their Corresponding Networks as Aircraft Sealant Materials
… of materials for high performance adhesives and sealants, and in particular for applications on high speed aircraft. Polar polysiloxane networks were prepared with cyanopropyl substituents to lower any propensity for the materials to swell in hydrocarbon fuels and to improve adhesion to metal …
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Effect of Highly Filled Light-Cured Resin Sealant on Bracket Shear Bond Strength in Demineralization Conditions
… the effect of a highly filled light-cured sealant (HFLCS) on bracket shear bond strength and subsequent adhesive remnant index (ARI) following exposure to cariogenic challenge. Specimens were divided into two groups to receive conventional primer or HFLCS prior to orthodontic bracket …
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Tensile Testing of Cold-Applied Joint Sealants
… expansion and contraction of concrete slabs. Sealants are commonly used in pavement joints to keep debris, deicing chemicals, and moisture out of the joint. When a joint sealant fails, the pavement can quickly deteriorate; however, when a joint sealant functions well, the pavement maintains …
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Performance-Based Evaluation of Joint Sealants for Concrete Pavements
… and contraction due to temperature fluctuations. Sealant is usually used in pavement joints to prevent roadway debris, deicing chemicals, and moisture from entering the joint. When sealant fails, the pavement deteriorates rapidly; and when joint sealant performs adequately, the pavement preserves …
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Evaluation of pavement joint sealants: a new testing technique
A new method to evaluate the performance of sealants, used in rigid pavement joints, was developed. A special fixture was designed to transfer cyclic in-line deflection, applied by a testing machine, to cyclic normal and shear deflections on a sealant sandwiched between two-2 x 2 x 2 in. portland …
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