胶粉稳定苯乙烯-丁二烯-苯乙烯三嵌段共聚物改性沥青的结构与性能  

Structure and properties of styrene-butadiene-styrene triblock copolymer modified asphalt stabilized by ground tire rubber

作　　者：姚鸿儒[1] 周帅[2] 王仕峰[1] 张勇[1] 张隐西[1] 

机构地区：[1]上海交通大学高分子材料研究所,上海200240 [2]中国石油大学(华东)重质油国家重点实验室,山东青岛266580

出　　处：《合成橡胶工业》2015年第6期461-465,共5页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51273110)

摘　　要：将苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SBS)、废旧轮胎胶粉(GTR)和相容剂环氧天然橡胶(ENR)熔融共混,然后再分散到沥青中制备了SBS/GTR复合改性沥青,考察了ENR含量、SBS/GTR(质量比)对复合改性沥青热储存稳定性和基本性能的影响。结果表明,随着ENR含量的增加或SBS含量的减少,SBS/GTR复合改性沥青的热储存稳定性提高,当ENR质量分数为1.0%、SBS/GTR为50/50时,复合改性沥青的热储存稳定性最佳;随着ENR含量的增加,SBS/GTR复合改性沥青的软化点、针入度、延度和黏度变化不大,但当ENR质量分数为10.0%时,改性沥青的软化点明显升高,针入度下降,属于一种比较硬质的改性沥青,具有较好的施工和易性;随着SBS含量的减少,SBS/GTR复合改性沥青的软化点、黏度和延度均降低。Storage-stable styrene-butadiene-styrene triblock copolymer （SBS）/ground tire rubber （GTR） hybrid modified asphalts were prepared by dispersing the melt blend of SBS, GTR and epoxidized natural rubber （ENR） into base asphalt. Effects of ENR content, SBS/GTR（mass ratio） on storage sta- bility, phase structure and properties were studied. The results showed that the storage stability of the modified asphalt was improved with the increase of ENR content or decrease of SBS content, and the modified asphalt achieved the best storage stability when mass fraction of ENR was 1.0% and SBS/GTR was 50/50. ENR content had a slight influence on the soften- ing points, penetration, ductility and viscosity of hybrid bind- ers, however, when the mass fraction of ENR reached 10. 0% , softening points increased and penetration decreased obviously, and the modified asphalt was hard and easy to oper- ate. The softening points, viscosity and ductility of the modi- fied asphalt all decreased with the decrease of SBS content.

关 键 词：苯乙烯-丁二烯-苯乙烯三嵌段共聚物 废旧轮胎胶粉 环氧天然橡胶 沥青 热储存稳定性 基本性能 

分 类 号：TQ317[化学工程—高聚物工业]