Preparation and Solution Characteristics of a Novel Hydrophobically Associating Terpolymer for Enhanced Oil Recovery
Preparation and Solution Characteristics of a Novel Hydrophobically Associating Terpolymer for Enhanced Oil Recovery
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DOI：
10.1007/s10953-011-9663-9
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发表时间：
2011-03
影响因子：
1.2
通讯作者：
Peng Zhang;Yefei Wang;Wuhua Chen;Haiyang Yu;Z. Qi;Kan Li
中科院分区：
文献类型：
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作者：
Peng Zhang;Yefei Wang;Wuhua Chen;Haiyang Yu;Z. Qi;Kan Li
以丙烯酰胺（AM）、甲基丙烯酸乙酯三甲基氯化铵（TMAEMC）为阳离子单体，少量5，5，5-三苯基-1-戊烯（TP<0.5mol-%）为疏水剂，采用胶束共聚技术制备了疏水缔合三元共聚物。用FT-IR和1H-NMR对共聚物的结构进行了表征。三元共聚物的水溶液性质也被调查作为聚合物浓度，盐度，温度和剪切速率的函数。结果表明，共聚物的增稠行为与共聚物链中疏水链段的数目和长度密切相关。正如预期的那样，由于分子间疏水缔合，当浓度超过0.25 g/dL-1时，三元共聚物表现出改善的粘度增强性能。利用芘探针荧光获得疏水微区的其他证据。此外，三元共聚物具有良好的耐盐性、耐温性和剪切后的恢复粘度。
Hydrophobically associating terpolymers were prepared by the micellar copolymerization technique using acrylamide (AM), 2-trimethylammonium ethyl methacrylate chloride (TMAEMC) as a cationic monomer, and small amounts of 5,5,5-triphenyl-1-pentene (TP<0.5 mol-%) as the hydrophobe. The structure of the copolymer was characterized by FT-IR and1H-NMR. The aqueous solution properties of the terpolymers were also investigated as functions of polymer concentration, salinity, temperature and shear rate. The results showed that the thickening behavior of these terpolymers are remarkably dependent on both the number and length of hydrophobic segments in the copolymer chains. As expected, the terpolymers exhibited improved viscosity enhancement properties as the concentration exceeded 0.25 g⋅dL−1, due to intermolecular hydrophobic association. Additional evidence for hydrophobic microdomains was obtained utilizing pyrene-probe fluorescence. Additionally, the ternary copolymers showed favorable salt tolerance, temperature resistance, and recoverable viscosity after shearing.