STUDY OF THE INFLUENCE OF MAGNESIUM HYDROXIDE ON THE COMBUSTIBILITY PERFORMANCE OF POLYMER COMPOSITIONS BASED ON ETHYLENE VINYL ACETATE COPOLYMER

Abstract

Purpose. To obtain the flame retardants polymer compositions for cables tested the effect of use EVA compositions with magnesium hydroxide, on indicators combustibility polymer. Methodology. We used the method of differential scanning calorimetry and defined heat flux dependence on the test time for each composition at temperatures from 20 °C to 600 °C rate of temperature rise: 50 °C/min, 75 °C/min, 100 °C/min. Using the model of free kinetics we determined dependence of the activation energy from the conversion, a dependence of the conversion on the time of the test, the dependence of the time of the conversion from the temperature for each concentration. To comparison of these parameters for each composition we plotted the dependence of the time of the conversion from the temperature and the dependence the degree of conversion from the time of temperature exposure during the combustion of each of the compositions. Results. We obtained the kinetic characteristics, allowing to determine the composition, which provided the best results to reducing the kinetic parameters of flammability of polymeric compositions. Originality. For the first time we used the DSC and model-free kinetics to determine the effect properties of ingredients of the polymer compositions on the combustibility performance. Practical use. The research results can be used to develop polymer compositions for cable products.

Keywords

• ethylene vinyl acetate copolymer
• magnesium hydroxide
• combustibility
• polymeric composition
• kinetics