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Silylation of non-terminal double bonds of unsaturated fatty acids with reactive organosilicons was successfully accomplished using the ‘Ene’ reaction route. The ‘Ene’ reaction, which is a subset of the famous Diels Alder reaction, enables grafting of vinyl silanes onto unsaturated organic molecules irrespective of the position of the double bond. This procedure was used to graft vinyltrialkoxysilanes...
Water soluble polysiloxanes were prepared by condensation of 3-aminopropyl diethoxymethylsilane followed by the reaction of the amines with ethylene carbonate to yield carbamate side chains with terminal hydroxyl groups attached to each silicon atom in the polymer chain. The molecular weight of these carbinol functional polysiloxanes was controlled by adding known concentrations of hexamethyldisiloxane...
Glycerol is an important biomass feedstock readily available as a by-product from the production of fatty acid methyl esters (FAME). Glycerol can be converted to glycerol carbonate, which readily reacts with many nucleophilic reagents including amines. Here, we demonstrate the reaction of glycerol carbonate and 3-aminopropylalkoxylsilane to yield hydroxyl alkyl terminated silanes. This reaction follows...
A hydrophilic silane was obtained from the reaction of ethylene carbonate and 3-aminopropyldiethoxymethylsilane. This silane undergoes rearrangement to yield an AB2-type hyperbranched polymer under anhydrous conditions but hydrolyzes and condenses to produce linear siloxanes under acid hydrolysis. The hydrolysis and condensation reactions as a function of time, HCl concentration and water content...
Hydroxyakyl terminated silanes were prepared by reacting 3-aminopropyl alkoxysilanes with ethylene carbonate. Unlike most silanes, these hydrophilic silanes are partially hydrolyzed in water and the siloxane oligomers thus obtained remain soluble in the water. Further condensation leads to water soluble linear or branched polysiloxanes depending on the structure of the hydroxylalkyl terminated silane...
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