The research for SBS and SBR compound modified asphalts with polyphosphoric acid and sulfur
The research for SBS and SBR compound modified asphalts with polyphosphoric acid and sulfur
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DOI：
10.1016/j.conbuildmat.2013.03.001
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发表时间：
2013-06
影响因子：
7.4
通讯作者：
Feng Zhang;Changbin Hu
中科院分区：
文献类型：
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作者：
Feng Zhang;Changbin Hu
通过选择性地添加多聚磷酸或硫磺，制备了具有良好贮存稳定性和短、长期老化前后高、低温性能的苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）和丁苯橡胶（SBR）复合改性沥青。研究了PPA和硫磺对SBS和SBR改性沥青老化前后储存稳定性、物理性能和流变性能的影响。为了改善SBS和SBR改性沥青老化前后的储存稳定性和高低温性能，SBR改性沥青应仅通过加入PPA进一步改性，线形SBS改性沥青应通过加入PPA和硫磺来改善，星形SBS改性沥青应仅通过加入硫磺来改善。进一步研究了PPA和硫磺在制备聚合物改性沥青中的改性机理。
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.