摘要
采用受阻胺光稳定剂Tinuvin770对5种沥青进行改性,研究了Tinuvin770对沥青物理性能及其薄膜烘箱老化和紫外光老化性能的影响。结果表明,5种沥青的延度都因Tinuvin770的加入而显著增大,软化点略有降低。Tinuvin770对部分沥青的热氧和光氧老化性能均有良好的改善效果,对部分沥青的光氧老化有改善作用,但却加速了其热氧老化,而对部分沥青的热氧和光氧老化均有加速作用。
Effects of hindered amine light stabilizer（Tinuvin770） on physical properties and aging properties of five bitumens are investigated.Results show that ductility of five bitumens is obviously increased while softening point is slightly decreased with the addition of Tinuvin770.Both thermo-oxidative and photo-oxidative aging resistance of some bitumens are improved observably by Tinuvin770.For some other bitumens,Tinuvin770 improves the resistance to photo-oxidative aging but accelerates the thermo-oxidative ageing rate.Moreover,the rate of both thermo-oxidative and photo-oxidative aging of some bitumens can be accelerated by Tinuvin770.
出处
《公路》
北大核心
2012年第10期158-161,共4页
Highway
基金
国家自然科学基金项目
项目编号51078300
交通应用基础研究项目
项目编号2011-319-811-420
中央高校基本科研业务费专项资金资助项目
项目编号2011-YB-04
关键词
沥青
受阻胺光稳定剂
热氧老化
光氧老化
bitumen
hindered amine light stabilizer
thermo-oxidative ageing
photooxidation aging
