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Improved storage stability of LDPE-SBS blends modified asphalts

机译:改善LDPE-SBS共混改性沥青的储存稳定性

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In this paper, Low Density Polyethylene (LDPE) / Styrene-Butadiene-Styrene (SBS) blends prepared under high shear stress were used as asphalt modifiers. Compared to the asphalts modified by LDPE and SBS added directly, the blend modified asphalts showed much better storage stability in the presence of sulfur at high temperature. No visible phase separation was observed under an optical microscope at high temperature and the morphology analysis indicated that the phase structure of the LDPE-SBS blend modified asphalts was unchanged with time at high temperature. After storage at 163 deg E for 48 h, the LDPE-SBS blend modified asphalts had no evidence of coalescence of polymer particles. The rheological properties of the asphalts were also improved by the addition of polymers in all cases.
机译:在本文中,在高剪切应力下制备的低密度聚乙烯(LDPE)/苯乙烯-丁二烯-苯乙烯(SBS)共混物用作沥青改性剂。与直接添加的LDPE和SBS改性的沥青相比,共混改性的沥青在高温存在硫的情况下显示出更好的储存稳定性。高温下在光学显微镜下未观察到可见的相分离,并且形态分析表明,LDPE-SBS共混改性沥青的相结构在高温下随时间不变。在163度E下储存48小时后,LDPE-SBS共混改性沥青没有聚合物颗粒聚结的迹象。在所有情况下,都可通过添加聚合物来改善沥青的流变性能。

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