Investigation of microstructures and ultraviolet aging properties of organo-montmorillonite/SBS modified bitumen
Investigation of microstructures and ultraviolet aging properties of organo-montmorillonite/SBS modified bitumen
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DOI：
10.1016/j.matchemphys.2011.04.078
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发表时间：
2011-10-03
影响因子：
4.6
通讯作者：
Xue, Lihui
中科院分区：
文献类型：
--
作者：
Zhang, Henglong;Yu, Jianying;Xue, Lihui
采用熔融共混法制备了有机蒙脱土(OMMT)/丁二烯-苯乙烯（SBS）改性沥青纳米复合材料。采用x射线衍射（XRD）、傅里叶红外光谱（FTIR）和原子力显微镜（AFM）对OMMT/SBS改性沥青的微观结构进行了表征。研究了OMMT对SBS改性沥青紫外老化性能的影响。FTIR和XRD分析表明，OMMT/SBS改性沥青形成插层结构。AFM分析表明，SBS改性沥青中分散畴与基体之间的相衬发生了反转，引入OMMT后，分散畴与基体之间的相衬减小。经UV老化处理后，改性沥青的粘度老化指数和软化点增量均显著降低。老化后沥青的形貌呈单相趋势，SBS的存在加速了这一趋势。而在OMMT的作用下，这些变化可以被有效地阻止，说明OMMT/SBS改性沥青具有良好的抗紫外线老化性能。(C) 2011 Elsevier B.V.版权所有
Organo-montmorillonite(OMMT)/Styrene-butadiene-styrene(SBS) modified bitumen nanocomposites were prepared by melt blending. The microstructures of OMMT/SBS modified bitumen were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM), respectively. The effect of OMMT on ultraviolet (UV) aging properties of SBS modified bitumen was investigated. FTIR and XRD analyses indicate that the OMMT/SBS modified bitumen forms an intercalated structure. It is observed that the phase contrast between the dispersed domains and the matrix is inverted in SBS modified bitumen, which is decreased with the introduction of OMMT according to AFM analysis. As a result of UV aging, both viscosity aging index and softening point increment of OMMT/SBS modified bitumen decrease significantly. There is a single phase trend in the morphology of the bitumen after aging, which is accelerated by the existence of SBS. However, these changes can be effectively prevented under the influence of OMMT, indicating the good UV aging resistance of OMMT/SBS modified bitumen. (C) 2011 Elsevier B.V. All rights reserved.