Carbon fibres based on meso-phase pitches

Carbon fibres

“…The necessity of levelling the molecular masses of the isotropic and liquid crystalline phases in the production of pitch has been put forward [147], in connection with homogeneity of melt rheological properties. However, this requirement seems disputable, since macromolecular polydispersity proper provides a plasticizing effect preventing hardening of the penta-and hexa-cyclic compounds at about 300 DC, with individual melting temperatures of 350-400 DC (glycene, fulminene and benzonaphthoanthracene [148]).…”