AN ATTEMPT TO CHARACTERIZE AND ELABORATE ANISOTROPIC PITCHES AND DERIVED CARBON-FIBERS .2. PREPARATION BY SEPARATION

Separation process yields anisotropic pitches without orientated aniso tropic droplets. Laboratory and industrial pitches (D1, D2, E1, and E2 ) were characterized and compared to two experimental pitches. The lat ter were obtained by fractionation of the two component pitches B3 and C by toluene. After graphitization, the fibers issued from these pitc hes are entirely devoided of zig-zag. However they are rich in disclin ations distributed at random. The amount of final disclinations largel y overcome the amount already present in the initial pitch. The physic ochemical properties of these pitches, their preparation procedure, th e textures at various scales of the derived fibers, and their graphiti zability as well as compared to those studied in part 1.