Progress in Mechanism of SBS-modified Asphalts
Progress in Mechanism of SBS-modified Asphalts
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发表时间：
2008
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通讯作者：
Dong Sheng-xiong
中科院分区：
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作者：
Dong Sheng-xiong
介绍了沥青和苯乙烯-丁二烯-苯乙烯三嵌段共聚物（SBS）的特性，分析了SBS与沥青的溶胀性和相容性，综述了SBS-沥青共混机理的研究进展。着重介绍了SBS改性沥青的研究进展，指出SBS改性机理可分为物理混合改性和化学改性，物理混合是指SBS颗粒吸收沥青中的油分，化学改性是通过添加添加剂使SBS与沥青发生交联或接枝反应来改善沥青的化学性能，是改善SBS改性沥青性能的重要方法。
The characteristics of asphalt and styrene-butadiene-styrene tri-block copolymer(SBS) were introduced.The swelling and compatibility properties between SBS and asphalt were analyzed.The advances in mechanism of SBS-modified asphalts were reviewed emphatically.It was pointed out that modified mechanism can be divided into physical mixing modification and chemical modification.Physical mixing means that the SBS particulates absorb the oil fractions from the asphalt to swell up and disperse evenly throughout the asphalt without chemical reaction between SBS and asphalt.Chemical modification means that crosslink or graft reactions happen between SBS and asphalt by adding additives to improve the chemical properties of asphalt.Furthermore,chemical modification is the important method to improve the properties of SBS-modified asphalt.