Katruk D. Basics of technologies of obtaining composites based on polyester-polyvinyl chloride binders

The dissertation is devoted to solving an important scientific and technical problem, namely, the development of technological principles for the production of composites based on modified polyester-poly(vinyl chloride) binders and fine-dispersed fillers with enhanced strength, thermophysical, anticorrosive and adhesion properties. An effective method for the modification of unsaturated polyester oligomers by poly(vinyl chloride) has been developed. It is based on increasing the technological compatibility of the components due to the partial dissolution and swelling of polyvinyl chloride macromolecules in styrene oligomer solution and diesterphtalate plasticizer, which made it possible to obtain high-tech matrices for polymeric composites with fine dispersed fillers. Polyester binders modified by poly(vinyl chloride) are characterized by values of surface hardness increased by 10 – 50 MPa, Vicat softening poin by 10 – 15 K, and strength of adhesive compounds by 5%, as well as values of technological shrinkage reduced by 10 – 15%. Polyester-polyvinyl chloride composites with inorganic fine-dispersed as a filler are characterized by enhanced physical and mechanical properties (surface hardness of 12 – 17 MPa, impact strength of 30 – 46 kJ/m2) and thermophysical (Vicat softening poin by 416 – 439 K) characteristics. The basic technological scheme of the process of obtaining the high-level polyester-poly(vinyl chloride) composite is developed, the technological stages are grounded and the parameters of operating practices are chosen.