EFFECT OF PHYSICAL MODIFICATION OF THE EPOXY BINDER ON THE PHYSICAL AND MECHANICAL PROPERTIES OF FIBERGLASS

doi: 10.25712/ASTU.2072-8921.2021.03.024

Abstract

mproving the physical and mechanical properties of composite materials by modifying the binder is one of the urgent tasks in the field of materials science. In this paper, the analysis of changes in the physical and mechanical properties of fiberglass during the physical modification of the epoxy binder is carried out. Previous studies [1] have shown that the optimal value of the physical modification of the epoxy binder is the introduction of talc as a modifier in an amount of 3% of the total mass of the composition. The optimal curing mode of the dispersed-filled composition was also determined. Based on this, modified and non-modified samples of stackplastic were made. Testing of modified and non-modified fiberglass samples for tensile strength, three-point bending and crack resistance showed an increase in impact strength by 31%, tensile strength by 82.5%, bending strength by more than 4 times and crack resistance by more than 2.5 times. The studies carried out in this work have shown the effectiveness of physical modification of the epoxy binder with talc at the optimal degree of filling and the curing mode of fiberglass.