一种疏水缔合型阳离子聚合物酸液稠化剂的研究

Study on a Hydrophobically Associating Cationic Polymer Applied for Acid Thickener

摘要:

摘要：以甲基丙烯酰氧乙基三甲基氯化铵（DMC）、甲基丙烯酰氧乙基二甲基正十六烷基溴化铵（HDMC）（实验室自制）为原料，采用自由基水溶液聚合制备阳离子型疏水缔合聚合聚合物P (DMC-HDMC)。利用红外光谱和荧光光谱分别对其分子结构和疏水微区结构进行表征，并对其在酸液中的流变性进行了研究。研究结果表明：P (DMC-HDMC)含有亚甲基长链 (CH2)16，因而在溶液中能够形成疏水微区，且其临界缔合浓度（CAC）为~1700ppm。在20wt%的HCl溶液中，当P (DMC-HDMC)浓度为0.16wt%(CAC）时，其流出时间分别为20.47s和40.8s；与非疏水缔合型聚甲基丙烯酰氧乙基三甲基氯化铵（PDMC）相比，随酸浓度的增加，PDMC 的粘度明显降低，而P (DMC-HDMC)则相对稳定，整体呈略微上升趋势。

Abstract:

Abstract: A hydrophobically associating cationic polymer P (DMC-HDMC) has been synthesized in aqueous solution by radical copolymerization, of which has been characterized in terms of infrared spectrum and fluorescence spectrum. Its acid solution properties have also been studied compared with polymer PDMC. Results have shown that, the structure of P (DMC-HDMC) was in consistent with what we have expected bearing long methane chain (CH2) 16; hydrophobic domain formed in aqueous solution and the critical associating concentration(CAC) of P (DMC-HDMC) was about 1700ppm; in 20wt% HCl solution, when the concentration of P (DMC-HDMC) were 0.16wt% (CAC）, their corresponding outlet time were 20.47s and 40.8s respectively; apparent viscosity of PDMC in acid solution gradually decreased with increase of acid concentration, while P (DMC-HDMC) changed little and even slightly increased as a whole.