Accession Number : AD0658717

Title :   ISOTHERMAL DEGRADATION OF UNTREATED AND FIRE RETARDANT TREATED CELLULOSE AT 350C,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s) : Lipska,A. E.

Report Date : 23 FEB 1967

Pagination or Media Count : 27

Abstract : Untreated and 2% (NH4)H2PO4 treated alpha cellulose samples were isothermally pyrolyzed in a fluidized bath in a nitrogen environment at 350C. The overall degradation pattern for the untreated samples seems to be similar to that which was observed between 275-300C. The active pyrolysis of the retardant treated cellulose was completed in less than 1.0 minute, leaving a residual weight of 34%; whereas the active pyrolysis of the untreated samples was completed in 10 minutes, yielding a residual weight of 16%. A detailed examination of the initial period of the rapid volatilization and decomposition of the untreated samples at 288C, indicated that the rate of volatilization and decomposition was at least four times as great as that portrayed by the region in which these parameters followed a zero-order rate. (Author)

Descriptors :   (*CELLULOSE, PYROLYSIS), (*FIRE RESISTANT MATERIALS, CELLULOSE), HEAT OF ACTIVATION, REACTION KINETICS, POLYSACCHARIDES, FLAMMABILITY, FIRE SAFETY, AMMONIUM COMPOUNDS, PHOSPHATES

Subject Categories : Physical Chemistry
      Safety Engineering
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE