Synonyms for tetrafunctional or Related words with tetrafunctional

trifunctional              difunctional              hexafunctional              pentafunctional              monofunctional              glycidylethers              polyfunctional              monoacrylates              trialkoxysilane              diphenol              trimethacrylates              glycidylether              alkoxysilanes              polyoxyalkylene              glycidylamine              diepoxides              diepoxide              dialcohol              glycidol              diglycidylaniline              polyoxyalkylenamine              polyepoxide              trialkoxysilanes              triisocyanates              tetraacrylates              triol              dimethylsiloxane              polyepoxy              polyalkyleneglycol              trimethylpropane              trimethylolmethane              trivinyl              dialkoxysilane              siloxy              organosilanes              difunctionalized              glycidylamines              diacrylates              polyetherdiamines              diepoxy              polythiols              monoalkoxy              aminosilanes              trimethacrylamides              polyetherpolyol              monool              diallylether              epoxysilanes              polyglycidyl              multivinyl             



Examples of "tetrafunctional"
Finally, the formation of cross-linked polymers involves tetrafunctional structural units. For example, in the synthesis of cross-linked polystyrene, a small fraction of monomeric styrene (or vinylbenzene) is remplaced by 1,4-divinylbenzene (or "para"-divinylbenzene). Each of the two vinyl groups is inserted into a polymeric chain, so that the tetravalent unit is inserted into both chains, linking them together.
The monomers used in radiation curable systems help control the speed of cure, crosslink density, final surface properties of the film, and viscosity of the resin. Examples of monomers include styrene, N-Vinylpyrrolidone, and acrylates. Styrene is a low cost monomer and provides a fast cure, N-vinylpyrrolidone results in a material that is highly flexible when cured, has low toxicity, and acrylates are highly reactive, allowing for rapid cure rates, and are highly versatile with monomer functionality ranging from monofunctional to tetrafunctional. Like oligomers, several types of monomers can be employed to achieve the desirable properties of the final material.
By definition, condensation liberates a small molecule, such as water or alcohol. This type of reaction can continue to build larger and larger silicon-containing molecules by the process of polymerization. Thus, a polymer is a huge molecule (or macromolecule) formed from hundreds or thousands of units called monomers. The number of bonds that a monomer can form is called its functionality. Polymerization of silicon alkoxide, for instance, can lead to complex branching of the polymer, because a fully hydrolyzed monomer Si(OH) is tetrafunctional (can branch or bond in 4 different directions). Alternatively, under certain conditions (e.g., low water concentration) fewer than 4 of the OR or OH groups (ligands) will be capable of condensation, so relatively little branching will occur. The mechanisms of hydrolysis and condensation, and the factors that bias the structure toward linear or branched structures are the most critical issues of sol-gel science and technology. This reaction is favored in both basic and acidic conditions.