文章摘要
含大单体四元共聚物的盐诱导增粘和缔合行为
Thickening Induced by Salt and Associating Behaviors of a Tetra-Polymer with Macro-Monomer
  
DOI:10.16865/j.cnki.1000-7555.2017.11.006
中文关键词: 大分子单体  分子间缔合  抗盐  原子力显微镜
英文关键词: macro-monomer  intermolecular associations  salt-tolerant  atomic force microscope
基金项目:“油气藏地质及开发工程”国家重点实验室自主创新研究基金(C016 )
作者单位
钟传蓉1,2, 黄晶晶2, 张 恒2 1.油气藏地质及开发工程国家重点实验室(成都理工大学),四川 成都 610059; 2.成都理工大学能源学院,四川 成都 610059 
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中文摘要:
      针对驱油聚合物难以应用于高盐油藏的难题,合成了新型大单体烯丙基辛基酚聚氧乙烯(20)醚(APE),将其与丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)和4-乙烯基联苯(VP)共聚,获得了抗盐共聚物PSA。PSA 显示了优异的由盐诱导的增粘性能,在70.00g/LNaCl中的临界缔合浓度只有0.3g/L;当NaCl浓度高于40.0g/L后,溶液黏度反而比纯水中的黏度高得多,且随着NaCl浓度的增加急剧上升。探针分析以及原子力显微镜结果显示,PSA分子链在纯水中的构象伸展,通过分子间疏水缔合作用形成了分子链束,高盐的加入使缔合作用显著加强,溶液黏度急剧上升。
英文摘要:
      A novel macro-monomer allyl-capped octylphenoxy poly(ethylene oxide) (APE, degree of polymerization is 20) was synthesized. Then a salt-tolerant tetra-polymer (PSA) was synthesized with APE, acrylamide (AM), sodium 2-acrylamido-2-methylpropane sulphonate (NaAMPS), and vinyl biphenyl (VP). This aimed at solving a problem that oil-flooding polymers can not be applied in the oil reservoirs with high salinities. This polymer displays the excellent thickening property induced by salt, and the critical association concentration is only 0.3 g/L in 70.0 g/L NaCl; as the NaCl concentration is higher than 40.0 g/L, the apparent viscosities are much higher than those in water and rises sharply with increasing NaCl concentration. The ultraviolet spectral analysis using pyrene as probe and atomic force microscope results show that polymer chains are expanded in water and the chain bundles are formed through the intermolecular hydrophobic associations, and that the intermolecular associations are strengthened obviously in the brine solutions with high salinities and the solution viscosities increase dramatically.
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