Precursors that produce graphitizing carbon include polyvinyl chloride (PVC) and petroleum coke.
Polyvinylidene chloride (PVDC) and sucrose produce non-graphitizing carbon.
A fluid phase is the dominant requirement for production of graphitizable carbons.
Since the time of Rosalind Franklin, researchers have put forward a number of models for their structure.
[3] More recently, some have put forward models that incorporate pentagons and other non-six-membered carbon rings.