Abstract
Various methods to test the surface functional groups of carbon blacks, …pH, volatile matter, hydrogen uptake from NaBH4 solution, vacuum pyrolysis, and the changes of the composition of the oxygen atmosphere heated in contact with carbon black … were examined.
As samples, acetylene, channel, furnace and thermal blacks were used.
The vacuum pyrolysis was experimented up to 1200°C at the rate of 200°C/hr, aad the evolved gas every 200°C intervals was analysed. The results showed the characteristics of the surface groups of the black samples, and CO2+CO gas increased in order of acetylene<thermal<furnace<channel.
In the experiment of oxygen atmosphere change heated with carbon black, the results indicated the same tendency mentioned above, in respect of surface reactivity of the four blacks used.
And the results of various methods used in the experiment, were compared and discussed respectively.
