一种交联共聚酸液稠化剂合成与性能

Synthesis and Performance of a Cross-Linking Copolymerization Acid Liquor Thickener

摘要: 以丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)为单体，聚乙二醇二丙烯酸酯(PEGDA)为扩链剂，合成一种交联共聚型酸液稠化剂(PAD)。实验确定PAD最佳合成条件为：n(AM):n(DMDAAC) = 5:1，单体总浓度为25% (wt)，PEGDA加量为2% (wt)，引发剂偶氮二异丁基脒盐酸盐(AIBA)用量为单体总质量的0.2% (wt)，PH = 8，反应温度为40˚C，反应24 h。红外光谱分析表征聚合物结构。1% (wt) PAD + 20% (wt)盐酸配制的稠化酸在120˚C、剪切速率为170 s⁻¹条件下剪切3 h，黏度保持在33 mPa•s，具有较好的耐温抗剪切性能。

Abstract: A cross-linking copolymerization acid liquor thickener was prepared using AM and DMDAAC as monomers and PEGDA as chain extender. The optimum conditions for the synthesis reaction were as follows: molar ratio of 5:1 for AM to DMDAAC; the total concentration of monomers was 25%; the chain extender concentration was 2%; the initiator AIBA concentration was 0.2% of the total mass of monomers; PH = 8; and the reaction was at the temperature of 40˚C for 24 h. The structure of the polymer was characterized with FTIR spectrum. The thickening acid system containing 1% PAD and 20% HCl showed good temperature tolerance and shearing resistance, and its final viscosity was 33 mPa•s after continuously shearing for 3 h at the temperature of 120˚C and at the speed of 170 s⁻¹.