The performance of Agbabu natural bitumen modified with polyphosphoric acid through fundamental and Fourier transform infrared spectroscopic investigations

Olabemiwo, Ojeyemi M.; Esan, Akintomiwa O.; Adediran, G. O.; Bakare, Hassan O.

doi:10.1016/j.cscm.2016.06.003

Cited by 16 publications

(17 citation statements)

References 13 publications

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“…It is clear that there is no difference in absorption peaks between the neat binder and modified binder A2P0 in the infrared spectrum, indicating that APAO reacts with asphalt binder physically. However, after PPA is added, a new absorption band appears at 1012 cm −1 , representing the P-O stretching vibration [ 17 , 60 ]. Masson et al [ 61 , 62 , 63 , 64 ] showed that a phosphorylated product was generated by the reaction of asphalt binder with PPA.…”

Section: Resultsmentioning

confidence: 99%

Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder

Pei

Fan

2021

Materials

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High production costs and poor storage stability have become important constraints in the manufacture of modified asphalt binder. To simplify the production process and reduce the production cost, amorphous poly alpha olefin (APAO) and polyphosphoric acid (PPA) were applied to prepare highly stable modified asphalt binder. The influence of APAO/PPA on the temperature sensitivity, rheological property, storage stability, compatibility and microstructure of neat binder were studied by rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rheometer (BBR) and Fourier transform infrared (FTIR) spectroscopy. The results show that the incorporation of APAO/PPA reduced the temperature sensitivity of neat binder. The combined effect of APAO/PPA contributed to the improvement in deformation resistance, which was evidenced by the increase in failure temperature and percent recovery. However, the compound modification of APAO/PPA decreased the binder’s low-temperature performance. APAO strengthened the fatigue resistance of the binder, while PPA reduced the anti-fatigue performance. Composite modified asphalt binder with superior storage stability could be prepared, which was confirmed by the desired Cole–Cole plots and fluorescence imaging. Furthermore, chemical and physical reactions occurred during the APAO/PPA modification process. Overall, 2 wt.% (weight percentage) APAO and 1.5 wt.% PPA are recommended for the production of modified asphalt binder with remarkable rheological performance and storage stability.

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Section: Resultsmentioning

confidence: 99%

Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder

Pei

Fan

2021

Materials

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“…Figure 14 shows that no new peak appears in the FTIR spectra of SBS/OSDOA-modified asphalts, indicating that OSDOA modification is a mainly physical reaction. However, a new absorption peak appeared at 997 cm −1 for the composite modified binder, which corresponded to the stretching vibrations of P-O [ 68 , 69 ]. This indicates that interactions have occurred between PPA and asphalt that lead to the microstructural changes in the modified asphalt.…”

Section: Resultsmentioning

confidence: 99%

Influence of Compound Modification of Oil Sands De-Oiled Asphalt and Polyphosphoric Acid on High- and Low-Temperature Performance of Styrene-Butadiene-Styrene-Modified Asphalt

Pei

Fan

2021

Materials

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Oil sands de-oiled asphalt (OSDOA) has become a bottleneck for refineries due to its enormous production and huge landfill costs. Applying OSDOA as a modifier is an effective way to reduce environmental pollution and disposal cost. In this study, the influences of OSDOA and polyphosphoric acid (PPA) compound modification on styrene-butadiene-styrene (SBS)-modified binder were investigated. The high-temperature rutting resistance, low-temperature anti-crack performance and fatigue resistance were obtained by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test. Storage stability and microstructure were also investigated by storage test and Fourier-transform infrared (FTIR) spectroscopy. The results demonstrated that the compound modification of OSDOA/PPA dramatically enhanced the deformation resistance of SBS-modified binder and reduced its low-temperature cracking resistance. The anti-fatigue performance was also decreased. Moreover, the combined effect of OSDOA and PPA could produce composite modified asphalt with excellent storage stability, which was verified by desirable fluorescence images. Furthermore, both physical and chemical interactions coexisted during the OSDOA/PPA compound modification process. Consequently, the optimal doses of OSDOA and PPA were determined to be 10 wt% and 1.0 wt%, considering of the balance between high- and low-temperature characteristics and storage stability of composite modified asphalt.

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“…The peaks at 1062 cm À 1 , 1005 cm À 1 and 794 cm À 1 could be attributed to asymmetric and symmetric stretching of SiÀ OÀ Si and out-of-phase PÀ O-C stretch peak. [24,25,27] The results shows that doping process was success due to characteristic peaks of MPSs and flame retardant material are present.…”

Section: Chemical Characterizationmentioning

confidence: 93%

“…The results indicated that condensation reaction of SiÀ OR groups and organic template extraction were success. [24] Figure 2 shows the synthesis of flame retardant polyphosporic acid ester. Bare polyphosporic acid(a) shows charac- teristic peaks of O=PÀ OH at 2674 cm À 1 and 2120 cm À 1 , PÀ O stretches at 1010 cm À 1 and 887 cm À 1 .…”

Section: Chemical Characterizationmentioning

confidence: 99%

Phosphorus Ester Containing Mesoporous Silica as Novel High‐Effective Flame Retardant in Polyurethane and Polyester Coatings

Aytan

Kahraman

2021

ChemistrySelect

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In this study mesoporous silica spheres (MPSs) and polyphosphoric acid based organophosphate ester flame retardant (FR material) material were synthesized and flame retardancy performance in acrylate-based polyurethanes (PUR) and polyester (PET) resins investigated. For this, both MPSs and FR material were synthesized according to literature and FR material was loaded into MPSs which takes the role of carrier. Loaded MPSs were put into UV curable PUR and PET resins and polymerized under UV radiation. Their characteristics were investigated by FT-IR, TGA, LOI, SEM and TEM. The results showed that FR material had excellent flame-retardant abilities for both PUR and PET series. The TGA curves suggested that synthesized FR material shows lower thermal stability at low temperatures than original materials however it showed good ability of char formation at higher temperatures, therefore improving the flame retardant property of samples. Moreover the LOI analysis showed that flame retardancy properties were improved significantly. The additive increased the LOI value from 20,5 and 21 to 26,5 and 27.

show abstract

The performance of Agbabu natural bitumen modified with polyphosphoric acid through fundamental and Fourier transform infrared spectroscopic investigations

Cited by 16 publications

References 13 publications

Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder

Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder

Influence of Compound Modification of Oil Sands De-Oiled Asphalt and Polyphosphoric Acid on High- and Low-Temperature Performance of Styrene-Butadiene-Styrene-Modified Asphalt

Phosphorus Ester Containing Mesoporous Silica as Novel High‐Effective Flame Retardant in Polyurethane and Polyester Coatings

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