Standard Test Method for Determining Flammability Characteristics of Plastics and Other Solid Materials Using Microscale Combustion Calorimetry

Importancia y uso:

5.1 This laboratory test method measures thermal combustion properties of materials (1-9).4

5.2 The test uses controlled thermal and thermal-oxidative decomposition of specimens and thermal oxidation of the specimen gases as they are released from the specimen to simulate the condensed and gas phase processes of flaming combustion, respectively, in a small-scale laboratory test (1-9).

5.3 The thermal combustion properties measured in the test are related to flammability characteristics of the material (4-9).

5.4 The amount of heat released in flaming combustion per unit mass of material is the fire load and the potential fire load (complete combustion) is estimated in Method A as h_c.

5.5 The net calorific value of the material (see Test Method D5865) is determined directly using Method B as h_c^o without the need to know the atomic composition of the specimen to correct for the latent heat of evaporation of the water produced by combustion, or to perform titrations to correct for the heat of solution of acid gases. See Table X1.2 for comparison of Microscale Combustion Calorimetry (MCC) data with Test Method D5865.

5.6 The temperature T_5 % of Method A measured at a heating rate β = 1K/s approximates the surface temperature at piloted ignition in accordance with Ref. (8 and 9) for purposes of fire modeling (see Guide E1591).

5.7 The heat release capacity η_c (J/g-K) is a flammability parameter measured in Method A that is unique to this test method.

5.8 The fire growth capacity FGC (J/g-K) is a flammability parameter measured in Method A at heating rate β = 1K/s that is unique to this test method.

Subcomité:

D20.30

Referida por:

E1591-20, E0800-20

Volúmen:

08.03

Número ICS:

13.220.50 (Fire-resistance of building materials and elements), 83.080.01 (Plastics in general)

Palabras clave:

calorimetry; carbon dioxide; combustion; controlled heating; heat release; heat release rate; heat release capacity; oxidative thermal decomposition; oxygen consumption calorimetry; pyrolysis; thermal analysis; thermal decomposition;