Investigation of negative temperature effect on impact strength of carbon fiber plastics with hybrid matrix

Abstract

The production technology of carbon fiber plastics with a hybrid matrix formed by an epoxy binder and a material representing an independent «liquid» phase in the composite structure (anaerobic polymer material, silicone elastomer, synthetic wax) is described. The addition of the «liquid» phase components to the polymer matrix leads to a change in the property complex of the composite, and the features of the chemical and molecular structure of the materials of the «liquid» phase contribute to a change in the characteristics of the phase transition. The impact strength is one of the criteria for evaluating the properties of composites based on polymer matrices. The results of testing carbon fiber plastics with various types of hybrid matrices (formed by various components of the «liquid» phase) for impact strength after exposure at temperatures (20±2) and –30 °C are presented. The influence of the «liquid» phase components on an change in impact strength and loss of impact strength of the composite after exposure to negative temperature conditions was evaluated. Samples with an anaerobic polymer material as part of a hybrid matrix have the highest average impact strength, while the absence of loss of impact strength after exposure to negative temperatures is observed in samples with synthetic wax.