LDPE/SBS共混物改性沥青体系的反应共混行为  

Reactive process of LDPE/SBS blend modified asphalt

作　　者：高光涛[1] 朱玉堂[1] 张勇[1] 张隐西[1] 王立志 钦兰成 

机构地区：[1]上海交通大学高分子材料研究所,上海200240 [2]江苏江阴中油兴能沥青厂,江苏江阴214400

出　　处：《合成橡胶工业》2003年第2期98-100,共3页China Synthetic Rubber Industry

基　　金：国家"863"计划资助项目(2002AA335100)。

摘　　要：利用应变控制流变仪对LDPE/SBS共混物改性沥青过程中的反应共混行为进行了初步研究,考察了交联剂及温度对反应共混行为的影响,分析了反应共混特性。结果表明,在交联剂存在下,LDPE/SBS共混物中的SBS与交联剂发生了化学反应,引起了转矩的升高。在温度高于120℃时开始反应,反应速度随温度的升高而加快。当温度超过230℃时,转矩在反应开始后先升后降,可能是聚合物发生降解所造成的。同时,增加交联剂用量有利于提高反应速度。The reactive process of LDPE/SBS blend modified asphalt in the pres en ce of crosslinking agent was studied by using a strain-controlled rheometer,and the effect of crosslinking agent and temperature were also studied.In the prese nce of crosslinking agent,the reaction between the SBS in the LDPE/SBS blend and crosslinking agent took place at temperature over 120 ℃.The reactive rate incr eased significantly with increasing temperature and the crosslinking agent level .But the torque dropped after the initial rising while the temperature was over 230 ℃due to the degradation of polymer.

关 键 词：低密度聚乙烯 苯乙烯-丁二烯嵌段共聚物 流变仪 LDPE/SBS共混物 改性沥青体系 反应共混行为 

分 类 号：TQ522.65[化学工程—煤化学工程]