Active binders

An active binder would be a preferable alternative if it combined a high energy content with favorable mechanical properties, together with a thermal stability higher than that of - Nitrocellulose or of - Polyvinyl Nitrate while remaining relatively uncomplicated to process. At pre-... 

Compositions that hold together a charge of finely divided particles and increase the mechanical strength of the resulting propellant grain when it is consolidated under pressure. Binders are usually resins, plastics, or asphaltics, used dry or in solution (-> Active Binders). 

Glycidyl azide polymer was originally developed in the USA as an -> Active Binder tor - Composite Propellants. Because this gas-producing component has been shown to have a low explosion temperature, it has been used in recent years as an active binder compound in -> LOVA gun propellant. 

As a binder system polymers are utilized. If the binders contain energy or gas-producing molecular groups (-N02, -N3), one classifies the binders as Active Binders (e.g. polynitropolyphenylene, glycidyl azide polymer, polyvinyl nitrate and nitrocellulose). If these substances are not present, then the binders are classified as inert binders. Depending on available processing methods, binder types such as thermoset material, thermoplast or gelatinizers can be used. They can then be formed and cured by chemical or physical means. 

The raw product obtained in this manner is first separated from copper chloride and then cleaned in several stages from solvent residues and low molecular weight elements. The resulting compound is a non-crystalline explosive of extremely high thermal resistance. In the field of - LOVA technology, it is used as an -< Active Binder in high ignition temperature propellants. 

One of the two m or steps in the application of avidin-biotin technology is to incorporate the biotin moiety into the experimental system (6). This is usually accomplished by covalendy attaching biotin to a biologically active binder. The binder can be an antigen, a primary monoclonal or polyclonal antibody, a complement, interleukin-2, or any other component of the immune system. 

Energetische Binder Aktlve Binder active Binders... 

At present, the difficult task of developing such improved active binders has yielded only two usable compositions ... 

These ethers may (or may not) have to further degrade back to the parent fungicide to display fungicidal activity. Binder polymers containing both the acrylate and chain extended acrylates might exhibit extended protection against mildew defacement. 

By selection of the proper membrane and processing parameters, it is possible in a simple way to get a product with the content- of lignin and molecular weight distribution required for an active binder Ingredient which combines chemically with PF resin for plywood. 

Dust is collected through the exhaust filtration from the shake-out installation and from the dosing and handling stations for dry green sand. The collected dust contains active binder compounds and may be recycled into the green sand circuit. 

Sunseri M, Cao J, Karafillis AP, Boyce MC (1996) Accommodation of springback in channel forming using active binder control numerical simulations and experiments. J Eng Mater Technol 118(3) 426-435... 

The alkaline activators include sodium or potassium hydroxide, silicate, and carbonate. The rate of setting and hardening of alkali-activated binders and the quality and quantity of the resulting reaction products depend on a variety of factors, including the quality of the starting aluminosilicate, the quality and amount of alkaline activator, and the temperature of reaction. 

Commercially produced alkali-activated binders have been introduced on the market in the United States under the name Pyrament and in France under the names Geopolymite and PZ-Geopoly. 

Hybrid systems will continue to be the subject of future research on the development of ultra-high-performance fibre-reinforced concrete for many applications. However, two other research topics on FRC have emerged in recent years (1) utilization of waste fibres as reinforcement, and (2) development of fibre-reinforced alkali-activated binders (also known as geopolymers). 

Pozzolans were obtained initially from volcanic rocks and natural volcanic ashes in Pozzuoli in Italy, for example. After grinding, a kind of cement was produced, but at the moment that production has only local importance. Artificial materials with pozzolanic properties are fly ash, ground slag or clays and shales calcinated at 650-1,000 C, SE, rice husk ash and other. When these materials are added to Portland cements they play the role of supplementary and less active binders and also of very fine fillers. 

Emulsion-based adhesives are adhesives that contain aqueous synthetic resin dispersions or emulsions or rubber latices as their principal raw material or active binder [41]. They are milky white, odorless hquids with solids contents of 40 - 60 %. In quantitative terms, emulsion-based adhesives are one of the most important groups of adhesives. They set by the release of water and the formation of a film fi om the emulsified or dispersed resin or rubber droplets. 

To improve rate performance, we have prep>ared cells containing a carbon layer on the current collector (CLC). This consists of a thin layer having a high concentration of conductive carbon material, situated between the activated carbon electrode layer and the current collector. We have foimd that a hydroxyalkylated chitosan (glycol-chitosan) derivative and 1,2,4,5-benzene-tetracarboxylic acid (pyromellitic acid) mixture acts as a thermally activated binder that adheres strongly to metal foil was very effective in improving the rate capability of EDLC cells. 

Bemal, S. A., R. San Nicols, R. J. Myers, R. Mejia de Gutierrez, F. Puertas, J. S. J. Van Deventer and J. L. Provis (2014). MgO content of slag controls phase evolution and structural changes induced by accelerated carbonation in alkali-activated binders . Cement and Concrete Research 57 33—43. 

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