SYNTHESIS AND STRUCTURE OF SUPERPLASTICIZERS BASED ON OXYPHENOLFURFURAL OLIGOMERS
Polycondensation of the same monomers but under various conditions gives polymers with different molecule masses and consequently different qualities. The synthesis of thermoactive oligomers, long-continued research of their characteristics and influence on aggregative stability и plasticization of mineral suspensions let obtain combinations possessing high plastifying activity. The best conditions are determined to synthesize superplasticizers based on oxyphenolfurfural oligomers with the highest plastifying ability. The composition and structure of thermoactive resorcinol-formaldehyde and phloroglucinefurfural oligomers are defined by methods of infared spectroscopy, proton magnetic resonance spectroscopy, chromatography, conductometry and some other. It is known that the thermoplastic oligomers production usually needs acid conditions. So, the necessity to neutralize reaction products arises, while the thermoactive oligomers production needs alkaline environment and takes place under softer conditions.