The Effect of Sizing Additives for Carbon Fiber on the Mechanical Properties of Polyetherimide Composites

The article presents the results of sizing of discrete carbon fibers with various substances and their effect on the properties of polyetherimide composites. As sizing agents, 1,3-diaminobenzene, 4,4'-dihydroxy-2,2-diphenylpropane, polyetherimide and oligoetherether sulfone were used. The study of physical and mechanical properties showed that all the substances used increase the properties of the carbon-filled composite based on polyetherimide. The highest mechanical properties are demonstrated by a composite containing carbon fibers treated with 1,3-diaminobenzene, which indicates improved compatibility of the filler and the polymer matrix and enhanced intermolecular interactions.