Degradation characteristics of SBS polymer and its contribution to weathering aging of modified asphalt

Hu, Mingjun; Sun, Daquan; Xu, Lei; Ling, Senlin; Tong, L.; Deng, Yue

doi:10.1016/j.conbuildmat.2023.130549

Cited by 17 publications

(5 citation statements)

References 27 publications

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“…Compared with the continuous yellow-green fluorescence in modified asphalt, the SBS content in aged SBS-modified asphalt has been reduced to a very low level, and the number of SBS modifiers after aging has been greatly reduced. It can be inferred that the SBS triblock copolymer underwent severe chain scission after asphalt aging, which is consistent with the findings of previous studies ( 27 – 31 ). As shown in Figure 5 c , the SBS particulates in regenerated SBS-modified asphalt are significantly restored, and the distribution is closer to that of the original SBS-modified asphalt, where the SBS particulates are basically restored to the level when they were not aged.…”

Section: Study Of the Microscopic Characteristics Of Rejuvenationsupporting

confidence: 92%

“…The aging process of styrene-butadiene-styrene (SBS)modified asphalt involves both the aging of the matrix asphalt and the degradation of the SBS modifier, in which the oxidative degradation of the SBS modifier is an essential factor leading to the deterioration of modified asphalt performance (27)(28)(29)(30)(31). While the physical properties of SBS-aged asphalt can be improved to some extent by waste soybean oil, degraded SBS modifiers cannot be restored.…”

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confidence: 99%

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Effects of Environment-Friendly Rejuvenator on the Rheological Properties and Microstructure of Aged Asphalt

Li,

Liu,

Wen

2023

Transportation Research Record: Journal of the Transportation R

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The purpose of this paper is to explore the feasibility of using waste soybean oil and the multi-epoxy compound trimethylolpropane triglycidyl ether (TMPGE) compound as a rejuvenator to recycle aged styrene-butadiene-styrene (SBS)-modified asphalt, and to develop an environment-friendly SBS-modified asphalt rejuvenator (ESMAR) to achieve dual waste reuse. The optimum ratio of each component of ESMAR and the production conditions of the formulation were firstly determined by the orthogonal test method. To evaluate the rejuvenation effect of ESMAR, the physical properties and rheological properties of SBS-modified asphalt before and after rejuvenation were studied. Physical properties test results showed that ESMAR can effectively soften the aged asphalt and decrease its softening point and viscosity, as well as increase its needle penetration. As far as rheological properties are concerned, ESMAR could improve the low-temperature cracking resistance and fatigue resistance of aged SBS-modified asphalt; however, there was a certain reduction in the rutting resistance. The microscopic characteristics of the rejuvenation of ESMAR were analyzed by fluorescence microscopy, infrared spectroscopy, and gel permeation chromatography tests for the aged SBS-modified asphalt before and after rejuvenation, which showed that ESMAR can not only reconstruct the degraded SBS molecules in the aged SBS-modified asphalt, but also has a “dilution” effect on the aged asphalt.

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Section: Study Of the Microscopic Characteristics Of Rejuvenationsupporting

confidence: 92%

mentioning

confidence: 99%

Effects of Environment-Friendly Rejuvenator on the Rheological Properties and Microstructure of Aged Asphalt

Li,

Liu,

Wen

2023

Transportation Research Record: Journal of the Transportation R

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“…However, accelerated weathering tests conducted by Al-Salem et al [ 131 ] on linear low-density polyethylene (LLDPE) blended with plastic films confirmed that extreme temperatures degrade them faster, as polyolefin polymers lose their amorphous region once exposed to UV radiation. UV radiation deteriorates plastic waste components, accelerating their rate of aging [ 132 , 133 , 134 ]. Likewise, previous research by Ávila-López et al [ 135 ] and Cacuro et al [ 136 ] acknowledged that many polymeric materials are vulnerable to UV radiation because the overall energy of UV radiation supersedes the strength of the inherent carbon bonds in polymers.…”

Section: Resultsmentioning

confidence: 99%

“…As the intensity of the solar radiation increased and aging time advanced, the aging depth of HVMA also increased continuously [133] Ni et al The method was effective in degrading polymers with high molecular weights through matrix-assisted laser desorption.…”

Section: Institutional Reviewmentioning

confidence: 99%

“… An experimental study on the aging of high-viscosity modified asphalt (HVMA) was performed The impact of UV radiation deterioration diffused from the surface of the asphalt to the asphalt inside in a gradual manner. As the intensity of the solar radiation increased and aging time advanced, the aging depth of HVMA also increased continuously [ 133 ] Ni et al Degradation characteristics of SBS polymer and its contribution to weathering aging of modified asphalt The study used shear rheology experiments (DSR) to determine the aging behaviors of SBS polymers The findings illustrate that the deterioration pattern of weathering SBS obeys a single function of exponential decay function. The effective content of the SBS decreased to 66.7%, 50%, as well as 33.3% post-accelerated weathering for 5.8, 10.5 and 14.5 h, respectively.…”

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confidence: 99%

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The Aging of Polymers under Electromagnetic Radiation

Maraveas,

Kyrtopoulos,

Arvanitis

et al. 2024

Polymers

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Polymeric materials degrade as they react with environmental conditions such as temperature, light, and humidity. Electromagnetic radiation from the Sun’s ultraviolet rays weakens the mechanical properties of polymers, causing them to degrade. This study examined the phenomenon of polymer aging due to exposure to ultraviolet radiation. The study examined three specific objectives, including the key theories explaining ultraviolet (UV) radiation’s impact on polymer decomposition, the underlying testing procedures for determining the aging properties of polymeric materials, and appraising the current technical methods for enhancing the UV resistance of polymers. The study utilized a literature review methodology to understand the aging effect of electromagnetic radiation on polymers. Thus, the study concluded that using additives and UV absorbers on polymers and polymer composites can elongate the lifespan of polymers by shielding them from the aging effects of UV radiation. The findings from the study suggest that thermal conditions contribute to polymer degradation by breaking down their physical and chemical bonds. Thermal oxidative environments accelerate aging due to the presence of UV radiation and temperatures that foster a quicker degradation of plastics.

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Preparation of polymer bitumen binder in the presence of a stabilizer

Jexembayeva,

Konkanov,

Aruova

et al. 2024

Polymer Engineering & Sci

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This research investigates the improvement of asphalt binder performance by adding polymers, with a specific emphasis on the viscoelastic qualities that impact fatigue resistance. The main objective is to examine the impact of polymer alteration on asphalt binders under different temperatures, degrees of strain, and frequencies by using the linear amplitude sweep test. An elaborate technique was used to assess the complex modulus (G*), phase angle (δ), and crossover frequency of binders that were changed using poly(styrene‐co‐butadiene‐co‐styrene) (SBS), poly(ethylene‐co‐vinyl acetate), and crumb rubber. The experiments were carried out within a temperature range of 20–40°C, strain levels varying from 1% to 10%, and frequencies ranging from 0.1 to 10 Hz. The findings indicate that the complex modulus (G*) of SBS‐modified binders reduced from 9000 to 2800 Pa when the strain rose from 2% to 8% at a temperature of 30°C. The rheological index of the SBS‐modified binder was measured to be 0.6, suggesting a higher level of fatigue resistance. The results highlight the practical benefits of using polymer‐modified binders to increase the durability of asphalt pavements, especially in areas with heavy traffic and severe weather conditions.Highlights This research aims to investigate the protective characteristics of polymers. Styrene‐co‐butadiene‐co‐styrene has a capacity to decrease the production of carbonyls. The crumb rubber‐modified asphalt was followed by the ethylene‐co‐vinyl acetate modified asphalt.

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Degradation characteristics of SBS polymer and its contribution to weathering aging of modified asphalt

Cited by 17 publications

References 27 publications

Effects of Environment-Friendly Rejuvenator on the Rheological Properties and Microstructure of Aged Asphalt

Effects of Environment-Friendly Rejuvenator on the Rheological Properties and Microstructure of Aged Asphalt

The Aging of Polymers under Electromagnetic Radiation

Preparation of polymer bitumen binder in the presence of a stabilizer

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