Preparation of a novel flow improver and its viscosity-reducing effect on bitumen
Preparation of a novel flow improver and its viscosity-reducing effect on bitumen
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新型流动改进剂的制备及其对沥青的降粘作用
DOI：
10.1016/j.fuel.2016.05.028
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发表时间：
2016-10-01
期刊：
影响因子：
7.4
通讯作者：
Pei, Jianzhong
中科院分区：
文献类型：
--
作者：
Li, Rui;Wang, Chengchao;Pei, Jianzhong
在现有原油流动性改进剂的基础上，通过共聚和酯化反应合成了丙烯酸十八酯-苯乙烯-马来酸酐共聚物（OASA），研究了其对沥青的降粘效果。本文采用红外光谱、差示扫描量热仪、布氏粘度计等对改性沥青的化学组成、热稳定性和粘度进行了表征。此外，还对改性沥青的常规性能进行了研究，以探讨改性剂的作用。结果表明：OASA改性是物理改性，改性机理是极性基团与共聚物长链的共同作用，改性剂具有良好的热稳定性，能够满足沥青的混合和压实要求，其降粘效果在一定范围内，且降粘效果与温度升高呈负相关;对于沥青的常规性能，OASA的改性作用使沥青的针入度和延度提高，软化点降低。(C)2016爱思唯尔有限公司版权所有
A novel flow improver, the copolymer of octadecyl acrylate, styrene, and maleic anhydride (OASA), was prepared by copolymerization and esterification reaction to study its viscosity-reducing effect on bitumen based its existing application on crude oil. In this paper, chemical compositions, thermal stability, and viscosity were characterized by infrared spectra (IR), differential scanning calorimetry (DSC), and Brookfield Viscometer, respectively. Besides, conventional properties of modified bitumen were investigated to study the effect of modifier. Results shown that OASA modification was physical and its mechanism was the combination effect of polar moiety and long alkyl chain of OASA copolymer; thermal stability of modifier was good enough to capable for asphalt mixing and compaction; viscosityreducing effect of OASA was proved with a considerable range and the effect was negative to temperature increasing; as for bitumen conventional properties, penetration and ductility got increased while the softening point got decreased under the OASA modifying effect. (C) 2016 Elsevier Ltd. All rights reserved.