Current Search: Aluminum compounds (x)
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- Title
- Synthesis and characterization of aluminum phenylphosphonate.
- Creator
- Brady, Jennifer Beth., Florida Atlantic University, Haky, Jerome E.
- Abstract/Description
-
A new aluminum phenylphosphonate compound, AlH(C6H5P03)2 was obtained by refluxing a mixture of aluminum nitrate and excess phenylphosphonic acid in water. The compound was characterized by elemental analysis, thermogravimetric analysis, infrared spectroscopy, x-ray powder diffraction and nuclear magnetic resonance spectroscopy. The data indicates that an intercalation compound formed, with an interlayer spacing of 15 angstroms. The compound contains both tetrahedrally and octahedrally...
Show moreA new aluminum phenylphosphonate compound, AlH(C6H5P03)2 was obtained by refluxing a mixture of aluminum nitrate and excess phenylphosphonic acid in water. The compound was characterized by elemental analysis, thermogravimetric analysis, infrared spectroscopy, x-ray powder diffraction and nuclear magnetic resonance spectroscopy. The data indicates that an intercalation compound formed, with an interlayer spacing of 15 angstroms. The compound contains both tetrahedrally and octahedrally coordinated aluminum atoms, suggesting the presence of two or more crystalline phases or a complex unit cell structure. The compound also possesses some unique ion-exchange properties.
Show less - Date Issued
- 1996
- PURL
- http://purl.flvc.org/fcla/dt/15314
- Subject Headings
- Aluminum compounds, Phosphonates
- Format
- Document (PDF)
- Title
- Synthesis characterization and ion exchange properties of aluminum phosphonates.
- Creator
- McCormack, Rupert Garth, Florida Atlantic University, Haky, Jerome E.
- Abstract/Description
-
Three aluminum organophosphonate compounds; aluminum phenylphosphonate, aluminum octylphosphonate, and aluminum octadecylphosphonate, have been synthesized by refluxing aluminum nitrate with an excess of the appropriate organophosphonic acid in aqueous, methanol, or butanol solvents respectively. Each of these compounds was found to have pillared layered structures and ligand to metal ratios of 2:1. Additionally, these compounds were shown to exhibit cation exchange properties. In contrast to...
Show moreThree aluminum organophosphonate compounds; aluminum phenylphosphonate, aluminum octylphosphonate, and aluminum octadecylphosphonate, have been synthesized by refluxing aluminum nitrate with an excess of the appropriate organophosphonic acid in aqueous, methanol, or butanol solvents respectively. Each of these compounds was found to have pillared layered structures and ligand to metal ratios of 2:1. Additionally, these compounds were shown to exhibit cation exchange properties. In contrast to that observed for conventional cation-exchange resins, the exchange capacities of these compounds are larger for small cations, such as Li+ and Na+, than for larger ions such as Na+ and K+. The results indicate a size selectivity which is directly related to the accessibility of these ions to the exchangeable sites of these compounds.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12748
- Subject Headings
- Inorganic ion exchange materials, Phosphonates, Aluminum compounds
- Format
- Document (PDF)
- Title
- Mechanistic study of chromate adhesion enhancement on aluminum 2024-T3 alloy.
- Creator
- Simmons, Ronald M., Florida Atlantic University, Granata, Richard D., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
- Abstract/Description
-
This research investigates the influence of chromate, as a conversion coating and as an inhibitor pigment, on the adhesion of epoxy coatings to an aluminum substrate. Epoxy coatings, with and without strontium chromate (SrCrO4) inhibitor pigment, are prepared according to manufacturers' specifications on AA2024-T3 substrates, with and without chromate conversion coatings. Specimens are exposed in an environmental chamber, cycling between high and low humidity conditions. After exposure,...
Show moreThis research investigates the influence of chromate, as a conversion coating and as an inhibitor pigment, on the adhesion of epoxy coatings to an aluminum substrate. Epoxy coatings, with and without strontium chromate (SrCrO4) inhibitor pigment, are prepared according to manufacturers' specifications on AA2024-T3 substrates, with and without chromate conversion coatings. Specimens are exposed in an environmental chamber, cycling between high and low humidity conditions. After exposure, specimens are evaluated using Electrochemical Impedance Spectroscopy (EIS), ASTM D3359 cross-cut tape test, and an Environmental Scanning Electron Microscope. From the evaluation it was determined that under these exposure conditions chromate does not increase the adhesive strength between the aluminum substrate and the epoxy coating system, but does provide corrosion inhibition. Regardless of the pretreatment or the coating system, the coating fails at the interface between the substrate and the coating.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12860
- Subject Headings
- Chromium compounds, Aluminum alloys, Impedance spectroscopy
- Format
- Document (PDF)
- Title
- Silicone (RTV) sealant bonded aluminum joints: An experimental study.
- Creator
- Antony, Melvin., Florida Atlantic University, Hartt, William H.
- Abstract/Description
-
The performance of adhesively bonded joints in terms of strength, sealing capacity and environmental resistance is of concern to designers in many fields including the marine industry. In the present work floating roller peel tests were utilized to study the bond properties of aluminum-silicone (RTV) joints. An attempt was made to identify the factors that affect the joint strength. Experiments revealed that peel strength increased with sealant thickness and decreased at high peel rates....
Show moreThe performance of adhesively bonded joints in terms of strength, sealing capacity and environmental resistance is of concern to designers in many fields including the marine industry. In the present work floating roller peel tests were utilized to study the bond properties of aluminum-silicone (RTV) joints. An attempt was made to identify the factors that affect the joint strength. Experiments revealed that peel strength increased with sealant thickness and decreased at high peel rates. Organo-silane primer SS4044 was found to improve the weatherability and strength of the joint. Results point out that mechanical interlocking combined with chemical alteration of the substrate surface was responsible for this improved adhesion. Combinations of three different environmental parameters were studied, and it was shown that seawater was the most hostile single type and a combined exposure to seawater and UV radiation (to simulate a marine environment) proved to be the worst overall. Tests showed that relaxation was governed by sealant thickness alone and was not affected by the marine environment.
Show less - Date Issued
- 1991
- PURL
- http://purl.flvc.org/fcla/dt/14711
- Subject Headings
- Aluminum--Bonding, Sealing compounds, Strength of materials
- Format
- Document (PDF)