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使用色谱柱分离得到的芳烃组分与环烷基础油共混,制备出两种芳烃含量不同的环烷油。通过紫外可见光光谱仪、傅里叶红外光谱仪等研究了不同芳烃含量环烷油填充苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)体系的热氧老化性能,结果表明芳烃组分是引起环烷油老化黄变的主要因素,但对充油体系的热失重等影响较小。通过小角X射线散射(SAXS)、透射电子显微镜(TEM)、动态热机械性能分析仪(DMA)等研究了SBS充油体系微观结构与机械性能间的关系,结果表明纯SBS为两相层状结构,而充油体系中的PS相呈柱状结构分散于PB相中,且芳烃含量较多的充油体系的PS相区间距较小、相区尺寸较大,SBS+1~#油(高芳烃油)的PS相区间距为27.64 nm,SBS+2~#油(低芳烃油)的为28.29 nm;热氧处理后的环烷油可使充油体系的相分散更趋微细化,其中SBS+aged1~#(高芳烃老化油)的相区间距为28.03 nm,SBS+aged2~#(低芳烃老化油)的为28.92 nm,PS相区尺寸减小及更均匀的分散可使充油体系的力学性能进一步提高,前者的拉伸强度提高了10.5%、断裂伸长率提高了9.4%,后者的拉伸强度提高了23.8%、断裂伸长率提高了4.4%。
The aromatic components separated from the column were blended with naphthenic base oil to prepare two naphthenic oils with different aromatic content. The thermo-oxidative aging properties of naphthenic oil-filled styrene-butadiene-styrene block copolymers (SBS) with different arene content were studied by UV-visible spectroscopy and Fourier transform infrared spectroscopy. The results showed that the aromatic components Naphthenic oil aging yellowing of the main factors, but the oil-filled system, such as thermal weight loss less affected. The relationship between microstructure and mechanical properties of SBS oil-filled system was studied by means of small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and dynamic thermomechanical analyzer (DMA) Structure, while the PS phase in the oil-filled system has columnar structure dispersed in the PB phase, and the oil phase of the oil-filled system with more aromatic content has smaller PS phase spacing and larger phase region size. The SBS + 1 ~ # oil Aromatic phase oil), the phase spacing of PS phase was 27.64 nm and that of SBS + 2 ~ # oil (low aromatic oil) was 28.29 nm. The naphthenic oil after hot oxygen treatment could make the phase dispersion of the oil-filled system finer. The phase spacing of SBS + aged1 ~ # (high-aromatic aging oil) was 28.03 nm, and that of SBS + aged2 ~ # (low aromatic aging oil) was 28.92 nm. The reduction of PS phase size and more uniform dispersion allowed the oil- The mechanical properties of the system further improved, the former increased by 10.5% tensile strength, elongation at break increased by 9.4%, the latter increased by 23.8% tensile strength, elongation at break increased by 4.4%.