摘要
以回收的包装废聚乙烯(PE)代替普通聚合物改性剂,对石油沥青进行改性,并采用旋转薄膜烘箱加热老化试验(RTFOT)对沥青的老化过程进行研究。结果表明,老化后基质沥青与改性沥青的软化点、135℃黏度升高,而针入度降低,其性能变化趋势基本相似,但随着改性剂量的增加,老化幅度变小。改性后分散于沥青中的包装废PE在老化过程中一方面发生自身降解影响沥青体系的性能,另一方面包装废PE通过吸收基质沥青中轻质油分发生溶胀,从而减少了沥青在热老化过程中游离基的产生,降低了由于轻质组分氧化对基质沥青性能的影响,改善了由于其自身老化对沥青体系的影响,最终导致改性后沥青老化性能改善。
The retrieved packaging waste polyethylene（PE） was selected to modify the ordinary asphalt. And the rotating Film Oven Test （RTFOT） was adopted to study the .aging resistance of the modified asphalt. The results indicate that the basic trend of raw asphalt and modified asphalt are same. Such as the softening point and viscosity of modified asphalt are increased while the penetration decreases. On the one hand, the waste PE scattered in asphalt itself takes place the degradation in the aging process affecting the asphalt system performance. On the other hand, the waste PE swells by the absorption of light oil in the asphalt. The swelling reduces the production of free radical in the aging process and reduces the effect of light-component oxide on the asphalt and leads to the aging properties of the asphalt improve after modified.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第8期64-67,共4页
Polymer Materials Science & Engineering
基金
陕西省13115重大科技专项资助(2008ZDKG-39)
陕西省工业攻关项目资助(2008K06-14)
西安市社会发展项目资助(YF07192)
