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The research for SBS and SBR compound modified asphalts with polyphosphoric acid and sulfur

机译：多磷酸和硫磺化SBS和SBR复合改性沥青的研究

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摘要

Styrene-butadiene-styrene block copolymer (SBS)-and styrene-butadiene rubber (SBR)-compound modified asphalts with good storage stability and high- or low-temperature properties before and after short- and long-term ageing are prepared by the addition of polyphosphoric acid or sulfur selectively. The effect of PPA and sulfur on the storage stability, the physical and rheological properties of SBS- and SBR-modified asphalts before and after ageing is studied. To improve the storage stability, high- or low-temperature properties of SBS- and SBR-modified asphalts before and after ageing, the SBR-modified asphalt should be modified further only by the addition of PPA, the linelike SBS-modified asphalt should be improved by the addition of PPA and sulfur, the starlike SBS-modified asphalt should be improved only by the addition of sulfur. The modification mechanism of PPA and sulfur in the preparation of those polymer modified asphalts (PMAs) is studied further.
机译：通过添加，可以制备出苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）和苯乙烯-丁二烯橡胶（SBR）复合改性沥青，具有良好的储存稳定性和短期或长期老化前后的高温或低温性能。选择性地选择多磷酸或硫。研究了PPA和硫对老化前后SBS和SBR改性沥青的储存稳定性，物理和流变性能的影响。为了提高老化之前和之后SBS和SBR改性沥青的储存稳定性，高温或低温性能，应仅通过添加PPA进一步改性SBR改性沥青，应将线状SBS改性沥青通过添加PPA和硫来改善星状SBS改性沥青只能通过添加硫来改善。进一步研究了PPA和硫磺在聚合物改性沥青（PMA）制备中的改性机理。

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