Abstract
We must be know the flashing and burning temperature of chemicals that the woods and other architectural materials of cellulose fibers were treated by chemicals for the purpose of fire-proof.
In this experiment the author adopted the filter-paper treated by chemicals as the test pieces of pure cellulose and considered the burning mechanisms by measuring the flashing and burning temperature of these test pieces.
The results are as follows :
(1) The relation between flashing point and velocity of the fire spreads.
(i) Alkali salts are go down the flashing point and ammonium salts are raise on flashing point by conc. solution.
(ii) Fe and Cu salts as FeSO4 · 7H2O, CuSO4 · 5H2O, FeCl2 · 4HO, and oxidizing agents as KNO3, KClO3, K2Cr2O7 are go down the flashing point.
(2) The relation between burning point and velocity of combustion.
(i) Ammonium salts are raise on burning point by conc. solution alike (1), but alkali salts are raise on flashing Point by conc.
solution in opposition (1).
(ii) Fe and Cu salts are low alike (1).
(3) The relation between chemicals and mechanisms of combustion.
Even if the test pieces are fire-proof treated by chemicals are burning up in about 600°C when to have a good supply of air and so the only one preventing method of burning is make an imperfect surface combustion.
(4) The relation to fire.
When the architectural materials are acted upon by alkali, are go down the flashing point.
