School of Civil Engineering

OTH19

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Material description

Material ID: OTH19

Material type: Glass reinforced polyester composite.

Polymer: Poly(ethylene terephthalate) (90%)

Additives (fire retardants, fillers or traces of inorganic elements): Calcium (7%), Titanium (1%), Iron (1%), traces of other elements (<1%)

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Poly(ethylene terephthalate) (PET)90
Calcium (Ca)7
Titanium (Ti)1
Iron (Fe)1
Traces of strontium (Sr)<1
Traces of silicon (Si)<1
Traces of scandium (Sc)<1
Traces of sulfur (S)<1
Traces of zirconium (Zr)<1
Traces of chlorine (Cl)<1

A. Material composition identification

A.1 Attenuated total reflection – Fourier transform infrared spectroscopy (ATR-FTIR)

Table 2. FTIR compound identification.
Identified Compounds
Poly(ethylene terephthalate) (PET)
...
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.
ElementMass Concentration (%)
Ca7
Ti1
Fe1
Sr<1
Si<1
Sc<1
S<1
Zr<1
Cl<1
K<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.
ConditionFraction of mass residue at 800°C
Non-oxidative (nitrogen)0.35
Oxidative (air)0.37
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 12176.6 x 10-4
Peak 23948.2 x 10-3
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 12166.6 x 10-4
Peak 23727.06 x 10-3
Peak 35219.6 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 .