Measured Data

Specific Heat

Experiments for specific heat [J/(kg K)], or heat capacity, were conducted using a heat flow meter on unconditioned and dried samples at 10 °C, 20 °C, 30 °C and 40 °C.

Unconditioned

Temperature (C) Specific Heat Mean (J/kg-K) Standard Deviation (J/kg-K)
10.0 1323.0 35.0
20.0 1387.0 36.0
30.0 1457.0 35.0
40.0 1517.0 37.0

Dried

Temperature (C) Specific Heat Mean (J/kg-K) Standard Deviation (J/kg-K)
10.0 1203.0 34.0
20.0 1251.0 33.0
30.0 1302.0 33.0
40.0 1351.0 38.0

Thermal Conductivity

Experiments for thermal conductivity [W/(m K)] were conducted using a heat flow meter on unconditioned and dried samples at 15 °C and either 45 °C or 65 °C.

Unconditioned

Temperature (C) Conductivity Mean (W/m-K) Standard Deviation (W/m-K)
15.0 0.106 0.003
65.0 0.124 0.002

Dried

Temperature (C) Conductivity Mean (W/m-K) Standard Deviation (W/m-K)
15.0 0.096 0.004
65.0 0.110 0.004

Mass Loss Rate (MLR)

Initial-mass-normalized mass loss rate [1/s] was measured in the simultaneous thermal analyzer experiments at three heating rates: 3 K/min, 10 K/min, and 30 K/min and mass loss rate [g/s] in the cone calorimeter at three heat fluxes: 25 kW/m2, 50 kW/m2, and 75 kW/m2.

Cone Calorimeter Test Notes:
This material typically warps, chars, and then fractures into smaller pieces when burning. Severe warping was observed in the first test, HF50_R1, and prevented in all other tests with the use of tie wires. A calcium silicate substrate was included in all tests except HF50_R1, HF50_R2, and HF50_R3. Representative test pictures are available at the link above to Download raw data.

Simultaneous Thermal Analyzer

Cone Calorimeter: 25 kW/m2

Cone Calorimeter: 50 kW/m2

Cone Calorimeter: 75 kW/m2

Heat Release Rate Per Unit Area (HRRPUA)

Experiments for heat release per unit area [kW/m2] were conducted on samples conditioned at 20°C and 50% relative humidity using a cone calorimeter at three different heat fluxes: 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material typically warps, chars, and then fractures into smaller pieces when burning. Severe warping was observed in the first test, HF50_R1, and prevented in all other tests with the use of tie wires. A calcium silicate substrate was included in all tests except HF50_R1, HF50_R2, and HF50_R3. Representative test pictures are available at the link above to Download raw data.

Cone Calorimeter: 25 kW/m2

25 kW/m² R1 25 kW/m² R2 25 kW/m² R3
Time to Sustained Ignition (s) 149.00 149.75 153.00
Time to Peak HRRPUA (s) 93.50 104.75 99.75
Peak HRRPUA (kW/m²) 453.45 462.47 468.53

Cone Calorimeter: 50 kW/m2

50 kW/m² R1 50 kW/m² R2 50 kW/m² R3 50 kW/m² R4 50 kW/m² R5 50 kW/m² R6
Time to Sustained Ignition (s) 45.25 39.50 42.25 43.50 40.75 46.00
Time to Peak HRRPUA (s) 77.00 91.00 86.50 89.50 82.50 88.25
Peak HRRPUA (kW/m²) 863.25 698.39 776.16 631.83 599.97 624.26

Cone Calorimeter: 75 kW/m2

75 kW/m² R1 75 kW/m² R2 75 kW/m² R3
Time to Sustained Ignition (s) 20.00 20.00 22.25
Time to Peak HRRPUA (s) 98.25 75.00 96.25
Peak HRRPUA (kW/m²) 694.10 709.48 671.45

Carbon Monoxide (CO) Yield

Carbon monoxide yield was measured during cone calorimeter experiments conducted at heat fluxes of 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material typically warps, chars, and then fractures into smaller pieces when burning. Severe warping was observed in the first test, HF50_R1, and prevented in all other tests with the use of tie wires. A calcium silicate substrate was included in all tests except HF50_R1, HF50_R2, and HF50_R3. Representative test pictures are available at the link above to Download raw data.

Incident Heat Flux [kW/m²] Mean CO Yield [g/g] CO Yield Std. Dev. [g/g]
25 0.006 0.0
50 0.006 0.001
75 0.005 0.0

Specific Heat Release Rate

Experiments for specific heat release rate [W/g], were conducted using a micro-scale combustion calorimeter at a heating rate of 30 K/min.

Derived Data

Soot Yield

Soot yield [g/g] was calculated from smoke obscuration data collected in cone calorimeter experiments conducted at heat fluxes of 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material typically warps, chars, and then fractures into smaller pieces when burning. Severe warping was observed in the first test, HF50_R1, and prevented in all other tests with the use of tie wires. A calcium silicate substrate was included in all tests except HF50_R1, HF50_R2, and HF50_R3. Representative test pictures are available at the link above to Download raw data.

Incident Heat Flux [kW/m²] Mean Soot Yield [g/g] Soot Yield Std. Dev. [g/g]
25 0.006 0.001
50 0.007 0.001
75 0.007 0.0

Effective Heat of Combustion (Δhc)

Effective heat of combustion [MJ/kg] is calculated from data collected in micro-scale combustion calorimeter experiments.

Micro-scale Combustion Calorimeter

Value R1 R2 R3 Mean Std. Dev.
Heat of Combustion (MJ/kg) 13.13 13.49 12.38 13.0 0.46

Temperature at Onset of Decomposition

The temperature at onset of decomposition [Tonset] is a derived quantity computed from data collected in simultaneous thermal analyzer experiments.

3 °C/min 10 °C/min 30 °C/min
Mean Onset Temperature (°C) 234 250 265
Std. Dev. Onset Temperature (°C) NaN 1 3
Mean Normalized MLR at Onset (1/s) 7.04e-04 6.59e-04 6.16e-04
Std. Dev. Normalized MLR at Onset (1/s) NaN 0.05e-04 0.08e-04
Mean Mass Fraction at Onset 0.97 0.98 0.98
Std. Dev. Mass Fraction at Onset NaN 0.00 0.00
Mean Temperature at end of Decomposition (°C) 412 424 439
Std. Dev. Temperature at end of Decomposition (°C) NaN 15 6

Band Averaged Emissivity

Band averaged emissivity was calculated from reflectance measurements conducted with an integrating sphere and Fourier transform infrared spectrometer.

Source Temperature [K] Emissivity Std. Dev.
600.0 0.907 0.001
800.0 0.880 0.002
1000.0 0.845 0.003
1200.0 0.805 0.005
1400.0 0.768 0.007
1600.0 0.736 0.009
1800.0 0.709 0.011
2000.0 0.686 0.013