沥青改性用星线共混丁苯嵌段共聚物的合成研究  

Synthesis of styrene-butadiene-styrene block copolymer with star and linear shaped molecule blend and its application in asphalt modification

作　　者：杨洪友[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院燕山分院橡塑新型材料合成国家工程研究中心,北京102500

出　　处：《弹性体》2013年第4期33-37,共5页China Elastomerics

摘　　要：以环己烷、正己烷混合物为溶剂,四氢呋喃为结构调节剂,正丁基锂为引发剂,丁二烯、苯乙烯为单体,采用双官能团线型偶联剂及四臂星型偶联剂,以阴离子两步法偶联工艺合成了沥青改性用苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)。结果表明:采用星线化学共混偶联所合成的样品GPC谱图呈三峰分布特征,可获得理想的沥青改性效果,尤其是可以实现改性沥青2个重要指标的平衡统一。In this paper,a tri-modal coupling technic was developed for the synthesis of styrenebutadiene-styrene block copolymer specially used in the asphalt modification.Dichloromethyl-silane and tetrachloride silicon in mixture was used as multi-function coupling agent to generate simultaneously star and linear shaped molecules in the anionic polymerization,which used cyclohexane/n-hexane mixture as solvent,tetrahatrafrun as polar modifier,n-butyl lithium as initiator.The GPC spectra of the synthetic sample showed characteristic tri-modal distribution,and the copolymer obtained with this method could achieve ideal balance in the properties of modified asphalt.

关 键 词：星线偶联 SBS 沥青 改性 

分 类 号：TQ334.3[化学工程—橡胶工业]