长脂肪链改性疏水缔合聚丙烯酰胺的制备与表征

Study on Preparation and Characterization of Hydrophobically Associating Polyacrylamide Modified with Long Fatly Chain

谭俊领 黎晓茸 张锋三 贾玉琴 刘笑春

TAN Jun-Jing LI Xiao-Rong ZHANG Feng-San JIA Yu-Qin LIU Xiao-Chun

本文以丙烯酸十八酯(ODA)为疏水单体，与丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酸（AA）通过自由基聚合法制得长脂链改性疏水缔合聚丙烯酰胺 (PAMBA)，研究了共聚反应的各种因素的影响，以黏度为指标确定合理的聚合工艺条件，并通过红外光谱仪、X-射线衍射仪和透射电镜对聚合物性能进行了表征。结果表明，PAMBA的最佳合成配方为ODA用量(占总单体质量) 0.6%、AMPS用量20%、AA用量10%、引发剂KPS用量0.3%。在常温、剪切速率170 s-1下，由最佳配方得到的质量分数为0.2%的PAMBA溶液黏度为56.2 mPa·s，PAMBA在水溶液中存在强烈的分子间缔合作用。

Hydrophobically associating polyacrylamide (PAMBA) modified with long fatly chain prepared by free radical polymerization of octadecyl acrylate (ODA), acrylamide (AM), 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and acrylic acid (AA). The effect factors in the process of polymerization were discussed, and the optimum copolymerization conditions were determined, and the performances of PAMBA were characterized by infrared spectrum (FT-IR), X-ray diffraction (XRD) and transmission electron microscope (TEM). The results showed that the optimal reaction condition was obtained with the viscosity value as evaluation index, the monomer content of ODA, AMPS and AA was 0.6%, 20% and 10%, respectively, and the initiator dosage was 0.3%. At room temperature and shear rate of 170 l/s, the viscosity of the 0.2% PAMBA solution was 56.2 mPa·s. There were strongly intermolecular hydrophobically associating interactions in the PAMBA aqueous solution.