韩国70道路沥青老化特性分析 (Ⅱ)官能团与分子结构变化  

ANALYSIS OF AGEING BEHAVIOUR OF SOUTH KOREA 70 ASPHALT PART(Ⅱ ) CHANGES OF FUNCTIONAL-GROUP AND MOLECULAR STRUCTURE

作　　者：金鸣林[1] 杨俊和[1] 冯安祖[2] 史美仁[2] 

机构地区：[1]上海应用技术学院,上海博士副教授200233 [2]南京化工大学,南京教授博士生导师210009

出　　处：《煤炭转化》2002年第1期91-96,共6页Coal Conversion

基　　金：攀枝花钢铁集团公司科技攻关项目

摘　　要：利用现代分析方法（ＩＲ光谱，ＳＥＣ．ＸＰＳ）考察了进口韩国 ７０道路沥青在 ０～２５０ ｈ和６０℃～１３０℃薄膜热老化过程中特征官能团与分子结构变化。试验发现：沥青经薄膜热老化时分子中连基官能团的吸收峰面积随老化时间逐渐增加，老化温度愈高变化愈明显。亚砜官能团的吸收峰面积有变化但不显著。老化后沥青分子中高分子量组分的含量增加，分散度变大。特征官能团与分子量分布的变化说明沥青分子间存在极性官能团之间的缔合作用。沥青分子中Ｏ，Ｓ原子的存在形态比较复杂．主要以亚砜、羰基官能团以及硫醚、硫醇的形式存在。沥青的老化是一个缓慢的自氧化过程．氧化反应符合自由基链反应历程。The changes of functional-group and molecular structure of South Korea 70 as-phalt for pavement at 0-250 h, 60-130 ℃ and the thin film heat ageing(TFHA) were investigated by modern analytics , such as IR spectra, SEC and XPS. The results found content of carbonyl ab-sorbing peak increased during ageing. The more remarkable the change of carbonyl group, the higher the ageing temperature. However , change of sulfoxide group was not obvious during age-ing. The component of higher molecular weight in asphalt increased in ageing, in addition, its dis-persion degree also increased. Such changes proved that there was association between the polar functional-groups. The atomic types of oxygen and sulfur in asphalt molecule were very complex, mainly there were typical functional-groups , such as carbonyl-group ,sulfoxide-group,sulfhydryl-group and sulfoether-group. The ageing reaction was on radical reaction mechanism.

关 键 词：道路沥青 官能团 老化特性 分子结构 

分 类 号：TQ522.65[化学工程—煤化学工程]