四臂星型SBS改性煤沥青的流变学研究

Research on rheology of four arm star-shaped SBS modified coal tar

以四臂星型SBS聚合物为改性剂,三氟化硼-乙醚络合物为催化剂,对煤沥青进行化学改性,制得改性沥青。利用热重分析、流变仪等测试技术对其流变性能和热性能进行了分析。结果表明,四臂星型SBS的加入,提高了煤沥青的热稳定性,有效地降低了沥青的温度敏感性;改性沥青体系没有明显的相分离现象。

The modified coal tar was prepared,using the method of chemical modification,by adding four arm star-shaped SBS as a modifier and clathrate boron trifluoride-ether as a catalyst. The samples were an-alyzed by TG and rheological instrument. The results show that four arm star-shaped SBS can improve the thermal stability of coal tar,reduce effectively the temperature sensitivity. The system of modified coal tar have no obvious phase separation phenomenon.