Rheological properties and viscosity reduction mechanism of aromatic/naphthenic oil pre-swelling crumb rubber modified asphalt

Zhao, Xiang; Li, Fan; Zhang, Xiao; Cao, Junsheng; Wang, Xiaolong

doi:10.1016/j.conbuildmat.2023.132545

Cited by 12 publications

(1 citation statement)

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“…The π bonds form a long-range conjugated network that confers a conductive character to graphene [ 14 ], obtaining rubbers with high electrical and thermal conductivity, and excellent mechanical properties [ 15 , 16 ]. Oils and polyethylene glycol (PEG) are other important additives used in rubbers to improve processability and achieve better compatibility between the filler and the rubber matrix [ 17 , 18 ]. In the case of PEG compounds, they have proven to be versatile and effective components capable of compatibilizing and increasing the interaction between filler and polymer.…”

Section: Introductionmentioning

confidence: 99%

Design and Study of Novel Composites Based on EPDM Rubber Containing Bismuth (III) Oxide and Graphene Nanoplatelets for Gamma Radiation Shielding

Álvarez-Cortez,

Molina,

Urbano

et al. 2024

Polymers

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The mechanical, thermal and gamma radiation attenuation properties of ethylene–propylene–diene monomer (EPDM)-based composites containing graphene nanoplatelets (GNs) and bismuth (III) oxide nanoparticles (B) were investigated. The use of polyethylene glycol (PEG) as a compatibilizer to improve the dispersion of the fillers was also investigated. The results showed that the combined use of these fillers resulted in a drastic increase in mechanical properties, reaching 123% and 83% of tensile strength and elongation at break, respectively, compared to those of EPDM. In contrast, the addition of PEG to composites containing EPDM GNs and B resulted in composites with lower values of mechanical properties compared to the EPDM/B/GN-based composite. However, the presence of PEG leads to obtaining a composite (EPDM/B/GNP) with a mass attenuation coefficient to gamma radiation (137Cs, 662 keV) superior to that composite without PEG. In addition, the composite EPDM, B and PEG exhibited an elongation at break 153% superior to unfilled EPDM. Moreover, the binary filler system consisting of 100 phr of bismuth (III) oxide and 10 phr of GN leads to reaching 61% of the linear damping coefficient of the EPDM composite compared to that value of the unfilled EPDM. The study of the morphology and the state of filler dispersion in the polymer matrix, obtained using scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively, provides a useful background for understanding the factors affecting the gamma radiation attenuation properties. Finally, the results also indicated that by adjusting the formulation, it is possible to tune the mechanical and thermal properties of EPDM composites reinforced with bismuth oxide and graphene nanoplatelets.

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