Klym Y. Development of fundamentals of the technology for obtaining thermoplastic nanocomposites based on montmorillonite and polyvinylpyrrolidone

The dissertation is devoted to the development of the fundamentals of technology for obtaining thermoplastic nanocomposites on the basis of a systematic study of the polypropylene (PP) and polyamide-6 (PA-6) modification by the modifier based on the intercalated with polyvinylpyrrolidone montmorillonite and the determination of the modifier's influence on the technological and working properties of the obtained materials. The technology of nano-modifier on the basis of montmorillonite (MMT) and polyvinylpyrrolidone (PVP) for thermoplastics has been developed applying the methods of DTA, DTG, TG and X-ray analyzes. It has been shown that under the mixing conditions of aqueous solutions of PVP and MMT in the ultrasonic field there is physical interaction between them with the formation of composite of elevated 60 °C thermal resistance compared to the initial PVP. The composite based on PA-6 with a modifier, which is characterized by increased physical and mechanical properties was obtained. The regularities of obtaining nanocomposites based on the mixture of PP/PA-6 with the modifier were determined. In these nanocomposites PA-6 and MMT promote an increase in thermal stability of the material, and PVP improves the compatibility of polar PA-6 with hydrophobic PP. According to the results of thermogravimetric studies it was determined that nanocomposites based on PE with modified PA-6 blends are homogeneous. The principle technological scheme and technological modes for obtaining thermoplastic nanocomposites have been developed. By the industrial tests which were provided by "Brash" Ltd and "Elektronpobutprylad" Company have confirmed the technological efficiency of nanocomposites developed under conditions of injection molding and also the good working properties of the products obtained on their basis. All above mentioned confirmed the possibility of manufacturing application of obtained nanocomposites.