Karandashov O. Engineering glass-fiber plastics modification for pipes producing by winding

The research object - the laws of technology of production and formation in products of mechanical, physical, physico-mechanical and operational properties of fiberglass products of different transverse-isotropic structure and the possibility of its regulation. The subject of research - fiberglass products based on epoxy and polyester oligomers with glass and basalt fillers with a transverse isotropic structure. The uninterrupted cross-fiber longitudinal and transversal winding (CLTW) method of the formation of fiberglass reinforced plastic products and directly the products that are characterized by a different transversal and isotropic structure were studied for the first time using the systematic large-scale integral approach. By varying the transversal and isotropic structure, in particular the ratio of the filler that is embedded in longitudinal and transversal directions in a wide range we managed to obtain fiberglass reinforced plastic products with a different ratio of the failing stress in longitudinal and transversal directions and provide an opportunity for the production of a wide range of the products with appropriate physical and mechanical properties. The research data obtained to improve the impregnation quality allowed us to raise the strength margin for fiberglass-reinforced plastic products and enabled thus their application under increased loading conditions increasing thus the equipment efficiency, decreasing the number of rejected goods and giving an opportunity to us to select ongoing materials with optimal technological properties. The studies of the polymer polyester and vinylester-based compounds enabled the extension of the range of corrosive media that can be transported by fiberglass reinforced plastic pipes produced using the CLTW method.