物理化学学报 >> 2003, Vol. 19 >> Issue (03): 256-259.doi: 10.3866/PKU.WHXB20030315

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碱对聚丙烯酰胺的分子形态及其流变性的影响

侯吉瑞;刘中春;张淑芬;岳湘安;杨锦宗   

  1. 大连理工大学精细化工国家重点实验室,大连　116000；石油大学石油天然气工程学院,北京　102249
  • 收稿日期:2002-05-13 修回日期:2002-07-31 发布日期:2003-03-15
  • 通讯作者: 侯吉瑞 E-mail:Houjirui@sina.com

Effect of Alkali on Molecular Configuration of Polymer and Its Rheologic Behavior

Hou Ji-Rui;Liu Zhong-Chun;Zhang Shu-Fen;Yue Xiang-An;Yang Jin-Zong   

  1. National Fine Chemical Engineering Laboratory, Dalian University of Technology, Dalian　116000；Petroleum ＆ Gas Engineering College, University of Petroleum ,Beijing　102249
  • Received:2002-05-13 Revised:2002-07-31 Published:2003-03-15
  • Contact: Hou Ji-Rui E-mail:Houjirui@sina.com

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摘要： 在碱、活性剂、聚合物三元(ASP)复合驱提高石油采收率的技术中,由于碱与聚合物分子的不相容性,严重地影响着驱油配方体系的研究及复合驱技术的推广.针对大庆油田的情况,利用HAAK流变仪,系统地研究了复合体系的流变性.结果表明,碱的加入明显地破坏了ASP复合体系的粘弹性.利用原子力显微镜,研究了碱对聚合物分子形态的影响.在无碱条件下,聚合物分子在液相充分舒展,而加入碱造成聚合物分子蜷缩,碱浓度越高,聚丙烯酰胺分子蜷缩成的线团越紧凑.在低浓度碱溶液中（质量分数0.3％）,聚合物分子也不能完全舒展,而是以多个分子侧向聚集状态存在.

关键词: 碱, 聚合物, 分子形态, 流变性, 多分子聚集体

Abstract: In the alkali/surfactant/polymer (ASP) flooding technology to enhance oil recovery, the unmatched alkali and polymer have serious influence on the study of composition of displacing system and application of ASP flooding. For the condition of Daqing oil field, the rheologic behavior of ASP solution has been systematically studied by using HAAK rheometer. The results show that the viscoelasticity of ASP solution decreases obviously with the addtion of alkali (see Fig.1). By using AFM, the effect of alkali on the molecular configuration of polymer has been studied. In obsence of alkali, polymer molecules stretch out themselves in liquid phase. But polymer molecules huddle up by adding alkali. The higher alkali concentration is the compacter curly clew of polymer molecules. With low alkali concentration (mass fraction 0.3％),polymer molecules cannot extent fully and exist in aggregation of multi-molecules(see Fig.5).

Key words: Alkali, Polymer, Molecule configuration, Rheologic behavior, 　Aggregation of multi-molecules