SBS改件沥青用中间相的制备及性能研究

发布时间：2018-04-09 23:11

本文选题：SBS　切入点：改性沥青　出处：《西安理工大学》2017年硕士论文

【摘要】：炭质中间相是一种优质炭素材料前驱体,其结构直接决定了炭素材料的性能。本课题通过向基质沥青中添加不同量的苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)制备SBS改性沥青试样,并在不同温度和不同保温时间下炭化制备SBS改性沥青中间相。通过偏光显微镜对比不同温度和不同保温时间的SBS改性沥青中间相样品的各向异性结构,分析温度和保温时间对中间相形成的影响,确定制备SBS改性沥青中间相的最佳工艺参数。在最佳工艺参数下制备不同改性剂添加量0、5%、7.5%、10%、12.5%、15%的SBS改性沥青中间相,通过偏光显微镜测试、扫描电镜测试测试、红外光谱测试(FTIR)、X射线衍射测试(XRD)和拉曼光谱测试等分析SBS改性剂及其添加量对中间相形成的影响。结果表明SBS改性沥青在最佳工艺条件下制备的中间相的光学各向异性为广域组织,中间相沥青的晶体颗粒属于微米级,形状不规则且分布不均匀,存在不同程度的团聚。SBS是一种实用有效的沥青共炭化改性剂,SBS改性剂的添加使得中间相沥青的晶体粒度有不同程度的增大。同时,SBS改性剂能够促进亚甲基结构和芳香分子的形成,中间相含量增多,改善中间相沥青的性能。改性沥青中添加合适剂量的SBS改性剂,中间相沥青的分子中烷基结构增多,可以改善中间相中芳香平面分子的取向排列,影响中间相沥青的各向异性结构。
[Abstract]:Carbonaceous mesophase is a kind of high quality precursor of carbon material, and its structure directly determines the properties of carbon material.In this paper, SBS modified asphalt samples were prepared by adding different amounts of styrene butadiene-styrene block copolymers to the matrix asphalt, and the mesophase of SBS modified asphalt was prepared by carbonization at different temperature and different holding time.The anisotropic structure of SBS modified asphalt mesophase samples at different temperature and different holding time was compared by polarizing microscope, and the effect of temperature and holding time on the formation of mesophase was analyzed.The optimum process parameters for preparing SBS modified asphalt mesophase were determined.Under the optimum technological parameters, the mesophase of SBS modified asphalt with different modifiers of 0% and 7.5% was prepared. The mesophase of SBS modified asphalt was measured by polarizing microscope and scanning electron microscope.The effect of SBS modifier and its addition on the formation of mesophase was analyzed by FTIR and Raman spectroscopy.The results show that the optical anisotropy of mesophase prepared by SBS modified asphalt under the optimum technological conditions is wide area structure, and the crystal particles of mesophase asphalt are of micron size, irregular shape and uneven distribution.The existence of different degree of agglomeration. SBS is a practical and effective modifier for asphalt co-carbonization. The addition of SBS modifier makes the crystal size of mesophase asphalt increase in varying degrees.At the same time, SBS modifier can promote the formation of methylene structure and aromatic molecules, increase the content of mesophase and improve the performance of mesophase asphalt.The addition of SBS modifier in the modified asphalt can improve the orientation of aromatic plane molecules in the mesophase and affect the anisotropic structure of mesophase asphalt by increasing the molecular alkyl structure of mesophase asphalt.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE626.86

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