Physicomechanical Properties of Carbon-Containing Film Composite Materials

Addition of 5 to 20% carbon filler to film composite material (FCM) decreases its strength and mechanical modulus of elasticity. Addition of porous carbon fillers (Aktilen fibre, industrial carbon, activated carbon) decreases the physicomechanical properties of FCM even at a low content, under 5%. FCM made from a liquid composition and containing carbon fibres exhibit anisotropy of the mechanical properties due to orientation of the filler; the strength and modulus of elasticity are higher in the longitudinal than in the transverse direction. A hypothesis is advanced concerning the presence of defective regions on the polymer—filler interface and stress concentration on the ends of the fibres, which probably also causes the decrease in the mechanical properties of the FCM. Acoustic studies suggested the existence of contacts between the carbon fibres at a content in FCM of 10% and higher.