Microstructure characterization and thermal properties of the waste-styrene-butadiene-rubber (WSBR)-modified petroleum-based mesophase asphalt

doi:10.1016/j.jmst.2018.09.027

Abstract

Abstract:

In this work, waste-styrene-butadiene-rubber (WSBR) -modified petroleum- based mesophase asphalt was prepared through a co-carbonization process. The influence of contents of WSBR and carbonization temperature on the properties of mesophase asphalt was investigated. The chemical constituents, microstructure and thermal property of the samples were characterized. The results show that using WSBR as modifier can significantly promote the formation of mesophase. When the temperature is constant, the addition of WSBR results in more optically anisotropic crystal structure in the samples, and a better thermal stability. When the content of WSBR is invariable, with increasing temperature, the content of anisotropic structure in mesophase asphalt becomes higher and more uniform. The thermal stability of the samples is the best when WSBR content is 10 wt%.

Key words: Waste-styrene-butadiene-rubber, Mesophase asphalt, Thermal properties, Microstructure

Jingbo Hu, Changqing Fang, Shisheng Zhou, Youliang Cheng, Hanzhi Han. Microstructure characterization and thermal properties of the waste-styrene-butadiene-rubber (WSBR)-modified petroleum-based mesophase asphalt[J]. J. Mater. Sci. Technol., 2019, 35(5): 852-857.

Figures/Tables 13

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Code	I_D/I_G	Peak width (1600?cm^-1)
MMA0-420	2.26	83.1
MMA10-420	2.40	90.5
MMA20-420	2.47	92.5
MMA0-450	2.32	92.0
MMA10-450	2.51	93.0
MMA20-450	2.56	93.6

Code	I_D/I_G	Peak width (1600?cm^-1)
MMA0-420	2.26	83.1
MMA10-420	2.40	90.5
MMA20-420	2.47	92.5
MMA0-450	2.32	92.0
MMA10-450	2.51	93.0
MMA20-450	2.56	93.6

Code	2θ (deg.)	d₀₀₂ (nm)	L_c (nm)	Og
MMA0-420	26	0.3421	2.52	0.9891
MMA10-420	25.466	0.3494	2.69	0.9898
MMA20-420	25.442	0.3497	2.69	0.9898
MMA0-450	25.254	0.3522	2.71	0.9899
MMA10-450	24.840	0.3581	2.79	0.9901
MMA20-450	24.740	0.3595	2.73	0.9899

Code	2θ (deg.)	d₀₀₂ (nm)	L_c (nm)	Og
MMA0-420	26	0.3421	2.52	0.9891
MMA10-420	25.466	0.3494	2.69	0.9898
MMA20-420	25.442	0.3497	2.69	0.9898
MMA0-450	25.254	0.3522	2.71	0.9899
MMA10-450	24.840	0.3581	2.79	0.9901
MMA20-450	24.740	0.3595	2.73	0.9899

Structure Type		Optical Characteristics
Isotropic		No optical activity (exist in mesophase asphalt with mesophase content <100%)
Mosaic	Fine MosaicMedium MosaicCoarse Mosaic	Anisotropic crystal radius<1.5μmAnisotropic crystal radius 1.5-5.0μmAnisotropic crystal radius 5.0-10.0μm
Streamline	Medium StreamlineCoarse StreamlineWide-area Streamline	Anisotropic crystal length<30?μm, width<5μmAnisotropic crystal length 30-60?μm, width 5-10μmAnisotropic crystal length>60?μm, width>10μm
Wide-area		Anisotropic crystal radius>60?μm