The Influence of Various Factors on the Nature of Destruction of Carbon Fibers in the Process of Extrusion Compounding

Abstract

Work was done on filling thermosetting resin with various carbon fibers. The influence of the mechanical properties of the fibers, the mixing rate and the mass fraction of the fibers in the compound on the degree of their destruction during extrusion compounding was studied. It was found that when the elastic modulus of the fibers is increased 1.7–1.8 times, the average fiber length is decreased 2.4–4 times. Therefore, the degree of shredding increases. As the fiber feed rate increases, longer filaments are formed, which is also confirmed by comparative data on the average fiber length. A 10% increase in the mass fraction of fiber in the compound results in a 1.9-2.5-fold decrease in the average fiber length, which is explained by an increase in the number of episodes of contact interaction between the fibers.