Особенности синтеза наномодификаторов на основе трифункциональных оксифенолов для минеральных суспензий

The focused influence on the rheological characteristics of highly-concentrated mineral suspensions used in the building industry is possible due to the directed synthesis of nano-sized macromolecules that have the certain structure and high adsorbing capacity on the surface of mineral particles and that are able to modify the boundary layer composition. The adsorbing capacity of organic compounds depends mostly on the hydrocarbon chain length and the molecular weight of the compound. The result of the condensate interaction of phenol and its derivatives with aldehydes is oligomers and polymers whose structure depends on the phenol functionality, the kind of aldehyde, molecular ration of reagents, the ph medium of the reaction. So, changing the type or the functionality of initial monomers or the synthesis conditions one can produce linear thermoplastic oligomers (novolacs) or highly branched thermosetting oligomers (resols). It has been found that the resole production takes place under softer conditions, and there is no necessity to neutralize reaction products as with no-volac production that usually requires acid environment. A number of thermosetting oligomers based on trifunctional polyatomic phenols have been synthesized. The theoretical and practical characteristics of resole oligomer synthesis have been studied, synthesis optimal conditions have been determined, the composition and structure of macromolecules were revealed by the methods of infrared spectroscopy, proton magnetic resonance spectroscopy, liquid chromatography and conductivity measurement, the length of the enlarged oligomer molecule was calculated. obtained compounds can be qualified as nanoscaled modifiers of mineral dispersions.