桐油预聚物改性沥青  

Modification of Asphalt by Tung Oil Prepolymer

作　　者：李国锋[1] 胡克良[1] 黄允兰[1] 杨海洋[1] 季明荣[1] 

机构地区：[1]中国科学技术大学理化科学中心,合肥230026

出　　处：《应用化学》2002年第6期544-547,共4页Chinese Journal of Applied Chemistry

摘　　要：将桐油用无水 Al Cl3引发聚合为低分子预聚物 ,预聚物再与沥青继续进行聚合反应以对其改性 .改性后的沥青针入指数和低温延度均有改善 .用红外、特性粘数 [η]及薄层色谱方法对预聚反应、聚合度及改性沥青进行了分析 .发现预聚物主要与沥青中的胶质、沥青质发生了反应 .反应物可以作为界面剂增加沥青中其它组分的相容性 .在沥青质上加成桐油预聚物后 ,可以克服其刚性强、互容性差的缺点 ,对稳定沥青的胶体结构、改善沥青的针入指数、低温延度有较好作用 .桐油预聚体在沥青混合物中的质量分数为 3 %～Tung oil prepolymer was prepared by mixing tung oil with anhydrous aluminum chloride at 230 ℃ for 1 h. Asphalt was modified by tung oil perpolymer through mixing at 240 ℃ until no 993 cm -1 band was observed. Intrinsic viscosity number measurement and TLC were used to monitor the prepolymerization reaction. The results showed that the prepolymer react mainly with the colloid and asphaltene compositions of asphalt. Part of the modified asphalt acts as an interfacial agent which is in favor of the compatibility of the mixture. The copolymer of asphaltene/tung oil prepolymer could not only reduce the asphaltenes rigidity and incompatibility, but also stabilize the colloid part of asphalt improving its penetration and low temperature ductility. A good result was obtained by adding 3%~6%(mass fraction) tung oil prepolymer into the asphalt.

关 键 词：沥青 改性 桐油 预聚物 低温延度 针入指数 无水氯化铝 共混 

分 类 号：TE626.86[石油与天然气工程—油气加工工程] TQ522.65[化学工程—煤化学工程]