含芳香基团的梳状聚合物型降凝剂与沥青质协同改善合成蜡油的流变性  

Comb-like Polymeric Pour Point Depressants with Aromatic Pandents and Asphaltenes Synergistically Improve the Flow Behavior of Model Waxy Oils

作　　者：杨飞 张晓平 李传宪 姚博 代抒彤 夏雪 孙广宇 DAI Shutong;XIA Xue;SUN Guangyu(College of Pipeline and Civil Engineering,Shanding Key Laboratory of Oil&Gas Storage and Transport Safety Engineering,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院山东省油气储运安全省级重点实验室，青岛 266580

出　　处：《高等学校化学学报》2019年第12期2606-2614,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51774311);山东省自然科学基金(批准号:ZR2017MEE022);中国博士后科学基金(批准号:2019TQ0354);青岛市博士后应用研究项目资助

摘　　要：采用流变学实验、差示扫描量热(DSC)分析、显微观察及沥青质沉淀实验研究了聚丙烯酸十八酯-马来酸酐(POM)、聚丙烯酸十八酯-马来酸酐-苯胺(POMA)及聚丙烯酸十八酯-马来酸酐-萘胺(POMN)梳状聚合物对合成蜡油的流变性能的影响规律.实验结果表明,这3种梳状聚合物降凝剂均能在一定程度上改善不含沥青质合成蜡油(MO-1)的低温流变性,其中POM对MO-1蜡油的流变性改善效果最佳.添加500 mg/kg POM后,MO-1的凝点从29℃降至23℃,屈服值从627. 20 Pa降至83. 35 Pa.而POM,POMA和POMN可以显著改善含0. 3%(质量分数)沥青质的合成蜡油(MO-2)的低温流变性,且添加500 mg/kg POMA后MO-2蜡油的流变改善效果最佳:凝点降至3℃,屈服值降至1. 27 Pa.可见,本文制备的梳状聚合物降凝剂均能与沥青质协同改善MO-2蜡油的流变性,并且向POM中引入芳香基团能进一步促进沥青质与降凝剂分子的相互作用,进而增强梳状聚合物降凝剂与沥青质的协同作用.The influence of poly-octadecyl acrylate-maleic anhydride( POM),poly-octadecyl acrylate-maleic anhydride-aniline( POMA) and poly-octadecyl acrylate-maleic anhydride-naphthylamine( POMN) copolymers on the flowability of model waxy oil with/without asphaltenes was investigated through rheological tests,differential scanning calorimeter( DSC) analysis,microscopic observation and asphaltenes precipitating tests.The results showed that the above three types of comb-like polymeric pour point depressants( PPDs) could improve the flowability of the model waxy oil without asphaltenes( MO-1) to some extent and the POM showed the best flow improving efficiency on the MO-1: after adding 500 mg/kg POM,the pour point of the MO-1 decreased from 29 ℃ to 23 ℃ and yield stress reduced from 62. 20 Pa to 83. 35 Pa. Comb-like polymers could significantly improve the flowability of model waxy oil with 0. 3% asphaltenes( MO-2),and MO-2 showed the best flowability after the addition of 500 mg/kg POMA: the pour point and yield stress of MO-2 dropped to3 ℃/1. 27 Pa,respectively. Therefore,the comb-like polymeric PPDs and asphaltenes can synergistically improve the flowability of waxy oils and the introduction of aromatic pendants in the POM molecules can enhance the interaction of comb-like polymeric PPDs and asphaltenes,thus further increasing the synergistic effect of comb-like polymeric PPDs and asphaltenes.

关 键 词：梳状聚合物 沥青质 合成蜡油 协同效应 

分 类 号：O631.1+1[理学—高分子化学]