Development and analysis of the physicochemical and mechanical properties of diorite-reinforced epoxy composites
Bekeshev A. Mostovoy A. Kadykova Y. Akhmetova M. Tastanova L. Lopukhova M.
1 August 2021MDPI AG
Polymers
2021#13Issue 15
The aim of this paper is to study the effect of a polyfunctional modifier oligo (resorcinol phenyl phosphate) with terminal phenyl groups and a dispersed mineral filler, diorite, on the physicochemical and deformation-strength properties of epoxy-based composites. The efficiency of using diorite as an active filler of an epoxy polymer, ensuring an increase in strength and a change in the physicochemical properties of epoxy composites, has been proven. We selected the optimal content of diorite both as a structuring additive and as a filler in the composition of the epoxy composite (0.1 and 50 parts by mass), at which diorite reinforces the epoxy composite. It has been found that the addition of diorite into the epoxy composite results in an increase in the Vicat heat resistance from 132 to 140-188 °C and increases the thermal stability of the epoxy composite, which is observed in a shift of the initial destruction temperature to higher temperatures. Furthermore, during the thermal destruction of the composite, the yield of carbonized structures increases (from 54 to 70-77% of the mass), preventing the release of volatile pyrolysis products into the gas phase, which leads to a decrease in the flammability of the epoxy composite. The efficiency of the functionalization of the diorite surface with APTES has been proven, which ensures chemical interaction at the polymer matrix/filler interface and also prevents the aggregation of diorite particles, which, in general, provides an increase in the strength characteristics of epoxy-based composite materials by 10-48%.
Diorite , Epoxy oligomer , Filler , Modification , Physicochemical and mechanical properties , Plasticizer
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Laboratory “Polymer Composites”, K. Zhubanov Aktobe Regional State University, Aliya Moldagulova Avenue 34, Aktobe, 030000, Kazakhstan
Laboratory “Modern Methods of Research of Functional Materials and Systems”, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya St., 77, Saratov, 410054, Russian Federation
Department “Electricity and electrical engineering”, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya St., 77, Saratov, 410054, Russian Federation
Department “Physics”, K. Zhubanov Aktobe Regional State University, Aliya Moldagulova Avenue 34, Aktobe, 030000, Kazakhstan
Department “Chemistry and chemical technology”, K. Zhubanov Aktobe Regional State University, Aliya Moldagulova Avenue 34, Aktobe, 030000, Kazakhstan
Department “Economics and Humanitarian Sciences”, Yuri Gagarin State Technical University of Saratov, Polytechnichskaya St., 77, Saratov, 410054, Russian Federation
Laboratory “Polymer Composites”
Laboratory “Modern Methods of Research of Functional Materials and Systems”
Department “Electricity and electrical engineering”
Department “Physics”
Department “Chemistry and chemical technology”
Department “Economics and Humanitarian Sciences”
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