ACP14
Material description
Material ID: ACP14
Material type: Zinc composite panel with a core consisting of polyethylene (PE) and fire retardants.
Polymer: Polyethylene (17%)
Additives (fire retardants, fillers or traces of inorganic elements): Magnesium Hydroxide (64%), Calcium Carbonate (15%), Titanium (1%), Silicon (1%), Aluminium (1%), Sodium (1%), traces of other elements (<1%)
Table 1. Estimated mass concentration of compounds.
| Compound | Mass Concentration (%) |
|---|---|
| Polyethylene (PE) | 17 |
| Magnesium Hydroxide (Mg(OH)2) | 64 |
| Calcium Carbonate (CaCO3) | 15 |
| Titanium (Ti) | 1 |
| Silicon (Si) | 1 |
| Aluminium (Al) | 1 |
| Sodium (Na) | 1 |
| Traces of iron (Fe) | <1 |
| Traces of potassium (K) | <1 |
A. Material composition identification
A.1 Attenuated total reflection – Fourier transform infrared spectroscopy (ATR-FTIR)
Table 2. FTIR compound identification.| Identified Compounds |
|---|
| Polyethylene (PE) |
| Magnesium Hydroxide (Mg(OH)2) |
| Calcium Carbonate (CaCO3) |
Figure 1 . FTIR spectra: Absorbance percentage versus wavenumber from the sample.
Figure 2. FTIR spectra: Absorbance percentage versus wavenumber from the sample and the identified compounds.
A.2 Energy Dispersive X-Ray Fluorescence (EDXRF)
Table 2. Inorganic elements and their mass concentration identified with EDXRF.
| Element | Mass Concentration (%) |
|---|---|
| Mg | 25 |
| Ca | 10 |
| Ti | 3 |
| Si | 2 |
| Al | 1 |
| Na | 1 |
| Fe | 1 |
| K | <1 |
| Zn | <1 |
Figure 3. EDXRF spectra. Counts vs energy. Identified elements are shown as vertical lines.
B. Thermogravimetric analysis
Table 3. Mass fraction of residue after thermal decomposition.
| Condition | Fraction of mass residue at 800°C |
|---|---|
| Non-oxidative (nitrogen) | 0.50 |
| Oxidative (air) | 0.49 |
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
| Peak ID | Temperature peak (°C) | Amplitude of peak (°C-1) |
|---|---|---|
| Peak 1 | 428 | 3.62 x 10-3 |
| Peak 2 | 487 | 7.82 x 10-3 |
| Peak 3 | 687 | 5.6 x 10-4 |
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
| Peak ID | Temperature peak (°C) | Amplitude of peak (°C-1) |
|---|---|---|
| Peak 1 | 463 | 8.84 x 10-3 |
| Peak 2 | 706 | 8.7 x 10-4 |
Figure 4. Normalised mass (solid line) and derivative of the normalised mass (dashed line) in 150 ml min-1 of nitrogen and a heating rate of 20°C min-1.
Figure 5. Normalised mass (solid line) and derivative of the normalised mass (dashed line) in 150 ml min-1 of air and a heating rate of 20°C min-1 .