苯乙烯丁二烯嵌段共聚物改性沥青热储存稳定性  

Hot Storage Stability of Styrene-butadiene Triblock Copolymer Modified Asphalt

作　　者：孙大权[1] 吕伟民[1] 

机构地区：[1]同济大学道路与交通工程系,上海200092

出　　处：《同济大学学报（自然科学版）》2002年第9期1064-1067,共4页Journal of Tongji University:Natural Science

基　　金：教育部高等学校博士学科点专项科研基金资助项目 (2 0 0 10 2 470 0 2 )

摘　　要：研究了苯乙烯丁二烯嵌段共聚物 (SBS)改性沥青热储存稳定性的三种典型情况 ,发现即使满足离析试验要求的改性沥青在热储存过程中也会发生性能下降的现象 .利用界面层理论解释了SBS改性沥青储存性能差异的原因 ,并以界面层理论为指导提出了反应性共混改性的方法 ,以提高SBS改性沥青的热储存稳定性 .实验结果表明 ,反应性SBS改性沥青具有良好的热储存稳定性 ,长期高温储存 (16 3℃ ,8d)未发生离析 .反应性SBS改性沥青具有SBS、沥青两相连续的空间网络结构 ,这使其使用性能显著提高 .Three different types of hot storage stability of styrene butadiene triblock copolymer (SBS) modified asphalts were investigated by hot storage test.It's found that during hot storage the performance of SBS modified asphalt decreased although phase separation didn't happen.The different hot storage stability performances of three SBS modified asphalts could be well interpreted with interface layer principle.Based on the interface layer principle,a new way that asphalt was chemically modified by SBS was put forward to improve hot storage stability performance.The results show that the asphalt chemically modified by SBS had good hot storage stability,which did not separate after being stored at 163?℃ for 8 days.The said asphalt showed tow interiocked continuous phases,which resulted in significant improvement of using performance.

关 键 词：改性沥青 苯乙烯丁二烯嵌段共聚物 热储存稳定性 化学改性 相结合 空间网络结构 使用性能 

分 类 号：TU535[建筑科学—建筑技术科学]