Дослідження взаємозв’язку між енергією поверхні волокнистих наповнювачів та міцністю полімерних композицій на їх основі

Abstract

For design of composite materials, it is important to predict its mechanical properties, which can be done by studying the relationship between the strength of adhesion, which can befound by experimental measuring of surface energy, and mechanical properties of the material. Nowadays relationships between these two parameters are still a field of debates. In this work we tried to clarify this question by analyzing the effect of additives that reduce wetting angle on the mechanical properties of the composite. The effect of thermal activation on the surface energy of a carbon fiber was estimated. The effect of additives the surface-active substances EFKA 3299 and tetraethoxysilane on the surface energy of the phenol-formaldehyde matrix was studied. Using the Owens/Wendt model, the values of the wetting angles of the filler surface by a matrix are calculated and correlated with the strength of the compositions.