微支化微交联聚丙烯酰胺的合成及性能研究

发布时间：2018-08-12 18:57

【摘要】：在聚合物驱实施过程中,机械降解,造成聚合物黏度下降,从而影响最终采收率。为提高聚合物工作黏度,提高抗剪切性能,对分子结构进行了合理设计,引入甲基丙烯酸二甲氨基乙酯(DMAEMA)功能单体。以过硫酸铵(APS)和DMAEMA为引发体系,在水溶液中采用常规自由基聚合制备了一系列具有微支化微交联结构的聚丙烯酰胺。其中,DMAEMA上氮邻位的仲碳上可形成引发活性点,进一步引发自由基聚合形成支链,链端自由基通过耦合终止形成交联结构。采用红外光谱研究了微支化微交联聚丙烯酰胺的结构,通过对聚合物溶液的性能测试探究了不同引发剂配比对聚合物性能的影响。结果表明,采用DMAEMA作为还原剂参与了聚合反应,体系中形成了微交联结构,聚合物的黏度及剪切稳定性随DMAEMA含量的增加而提高;DMAEMA同时具有链转移作用,含量过大时聚合产物分子量降低,剪切稳定性下降。
[Abstract]:In the process of polymer flooding, mechanical degradation results in the decrease of polymer viscosity, which affects the final recovery. In order to improve the working viscosity and shear resistance of the polymer, the molecular structure was designed reasonably, and the functional monomer of (DMAEMA) was introduced. A series of polyacrylamide with microbranched microcrosslinked structure was prepared by conventional radical polymerization in aqueous solution with ammonium persulfate (APS) and DMAEMA as initiators. In DMAEMA, the active point of initiation can be formed on the nitrogen-adjacent secondary carbon, and the radical polymerization is further initiated to form a branched chain, and the chain end radical terminates to form a cross-linking structure. The structure of microbranched microcrosslinked polyacrylamide was studied by infrared spectroscopy. The effects of different initiator ratios on the properties of polymer were investigated by testing the properties of polymer solution. The results showed that the microcrosslinking structure was formed by using DMAEMA as reducing agent, and the viscosity and shear stability of the polymer increased with the increase of DMAEMA content. When the content is too high, the molecular weight of polymerization product decreases and the shear stability decreases.
【作者单位】：中国石化胜利油田分公司勘探开发研究院;
【基金】：中国石化股份公司科技攻关项目(P15033)
【分类号】：TE357.46

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