Reinforcement of Epoxy Composites with Application of Finely-ground Ochre and Electrophysical Method of the Composition Modification.

Amirbek Bekeshev,Marina Lopukhova,Lyazzat Tastanova,Anton Mostovoy,Svetlana Kalganova,Yulia Kadykova

doi:10.3390/polym12071437

Abstract

The conducted studies have proven the possibility of the directed control of operational properties of epoxy composites, due to the addition of finely-ground ocher into their composition, and the use of microwave modification of the epoxy composition. The rational content of ocher as a modifying additive (0.5 parts by mass) and a filler (75 parts by mass) of the epoxy composition has been selected, which ensures the improvement of the studied complex of physical-mechanical properties. It has been proven that ocher affects the structure formation processes and the structure of the epoxy composite, thus increasing its thermal, heat and fire resistance. During the research, the application efficiency has been proven, and the optimal parameters of the microwave modification (power—350 W; duration—30 s) of epoxy compositions filled with ocher, which increase physical-mechanical characteristics of composites, have been selected.

Highlights

One of the promising branches of chemical industry is the production of polymer materials [1].At present, materials based on cross-linked polymers play an important role in various fields of human activity due to their structure, which gives the materials a number of valuable qualities, such as high hardness, chemo- and heat resistance, etc
The addition of ocher into an epoxy composite provides an increase in the composite heat resistance, which can be seen in a shift in the initial temperature of the main stage of destruction to higher temperatures, while the yield of carbonized structures increases from 54% to 58–76%, providing a decrease in the emission of volatile pyrolysis products into the gas phase, which reduces flammability of the epoxy composite
It has been proven that ocher ensures the improvement of the studied complex of physic-mechanical properties

Summary

Introduction

Materials based on cross-linked polymers play an important role in various fields of human activity due to their structure, which gives the materials a number of valuable qualities, such as high hardness, chemo- and heat resistance, etc. One of the main directions of the further development of epoxy composites with enhanced operational properties is the addition of various fillers (basalt, talc, chromite, metal oxides, technogenic waste from industrial enterprises) into their composition, which can significantly decrease the cost of finished products by reducing the cost of expensive binders, as well as give them various functional properties [2,3,4,5,6,7,8,9,10,11,12].

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Conclusion