FIELD: polymer materials.
SUBSTANCE: invention relates to the field of self-recovering thermosetting materials and can be used to assess the degree of self-recovery of polymer matrices used in the manufacture of reinforced plastics. The method for assessing the degree of self-recovery of adhesive joints includes measuring the mechanical characteristics before and after heat treatment, which initiates self-recovery of the sample after destruction, and determining the degree of self-recovery in relation to the value of the characteristics of the sample after heat treatment to the value of the characteristics of the original sample. To do this, the binder is poured into aluminum cups with a steel wire in the middle, cured and at the first test, the steel fiber is not completely pulled out of the matrix layer. At the same time, the maximum destructive force of the polymer-fiber system is determined. In the second test, the adhesive joint of the samples is completely destroyed after heat treatment and self-recovery. The adhesive strength is calculated for each tested sample before and after heat treatment. The degree of self-recovery is calculated in relation to the adhesive strength of the sample after self-recovery to the strength of the original sample.
EFFECT: invention makes it possible to reduce the cost of manufacturing and simplify the production of prototypes from binders with the effect of self-recovery, to determine the strength at the interface “polymer with the effect of self-recovery - steel fiber”.
1 cl, 3 dwg, 2 tbl
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