具有核壳结构的聚丁二烯接枝聚苯乙烯改性沥青的性能  

Performance of asphalt modified with core-shell structural polybutadiene grafted polystyrene

作　　者：张宝昌[1] 吴明金[2] 宁志刚[2] 高光辉[2] 于祥[2] 张会轩[2] 张宝砚[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]长春工业大学生物工程学院,吉林长春130012

出　　处：《合成橡胶工业》2007年第5期374-377,共4页China Synthetic Rubber Industry

基　　金：中国教育部科学技术研究重点资助项目(206040)。

摘　　要：采用种子乳液聚合法制备了具有核壳结构的聚丁二烯接枝聚苯乙烯(PB-g-PS),并将其与沥青通过高速剪切共混制备了PB-g-PS改性沥青,考察了PB-g-PS改性沥青的物理性能以及热老化性能、感温性、热贮存稳定性和相容性。结果表明,当PB-g-PS的质量分数为5%时,改性沥青的高温热稳定性、抗低温开裂性较好;与基质沥青相比,改性沥青的热老化性能得到改善,感温性下降;在相同条件下,PB-g-PS改性沥青的热贮存稳定性要好于苯乙烯-丁二烯-苯乙烯嵌段共聚物改性沥青;核壳结构的PB-g-PS与基质沥青具有一定的相容性。Core-shell structural polybutadiene grafted polystyrene （PB-g-PS） was synthesized by using seeding emulsion grafting polymerization, and modified asphalt was prepared by blending PB-g-PS at 4 000 r/min. The physical properties, thermal aging properties, temperature sensibility, thermal storage stability and compatibility of PB-g-PS modified asphalt were investigated. The results showed that the stability at high temperature and cracking resistance at low temperature of modified asphalt were better when mass fraction of PB-g-PS was 5%. Compared with matrix asphalt, aging resistance of modified asphalt improved and temperature sensibility decreased. At the same conditions, thermal stor- age stability of asphalt modified with PB-g-PS was superior to asphalt modified with styrene-butadiene- styrene block copolymer. To some extent, the compatibility of PB-g-PS with modified matrix asphalt was better.

关 键 词：核壳结构 聚丁二烯接枝聚苯乙烯 改性沥青 热老化性能 感温性 热贮存稳定性 相容性 

分 类 号：TE626.86[石油与天然气工程—油气加工工程]