以功能性疏水长链十八烷基二甲基烯丙基氯化铵（HM18）、丙烯酰胺（AM）和2-甲基-丙烯酰氧乙基-三甲基氯化铵（DMC）为原料，利用反相乳液聚合法合成了一种乳液型阳离子疏水缔合聚丙烯酰胺HAM-D。确定了其最佳合成条件：引发剂质量分数为0.04%（以单体总质量计），w（单体）=24%，反应温度为35℃，反应时间为6 h。通过红外光谱（FT-IR）、激光粒度仪、热重分析仪（TGA）和动态流变仪对HAM-D结构与性能进行表征。结果表明，HAM-D乳液粒径分布窄，稳定性好；与普通聚丙烯酰胺相比，HAM-D具有良好的耐热性；随着质量浓度的升高，HAM-D水溶液表观黏度逐渐上升，在5×10⁴ mg/L矿化水中仍可达到163 mPa·s，表明HAM-D具有较好的增稠、耐盐性能；剪切300 s后，表观黏度由249 mPa·s降到236 mPa·s，表现出良好的耐剪切性能。

HAM-D,an emulsion type hydrophobically associating cationic polyacrylamide,is synthesized through inverse emulsion polymerization method by using a functional hydrophobic long-chain octadecyl dimethyl allyl ammonium chloride (HM18),acrylamide (AM) and 2-methyl-acryloyloxyethyl-trimethylammonium chloride (DMC) as raw materials.The optimum synthetic conditions are determined that w(initiator)=0.04% (based on the total mass of monomers),w(monomers)=24%,reaction temperature is at 35℃ and reaction time lasts for 6 h.The structure and properties of the prepared HAM-D are characterized by means of FT-IR,laser particle size analyzer,thermo gravimetric analyzer (TGA) and dynamic rheometer.The results show that HAM-D has narrow distribution of emulsion particle size and good emulsion stability.Compared with common polyacrylamide,HAM-D has good heat resistance.The apparent viscosity of HAM-D aqueous solution will increase gradually as the mass concentration of HAM-D increases.The apparent viscosity of HAM-D solution can reach 163 mPa·s in 5×10⁴ mg·L^-1 mineralized water,reflecting that HAM-D has good thickening and salt resistance performances.After shearing 300 s,the apparent viscosity decreases from 249 mPa·s to 236 mPa·s,showing an excellent shear resistance.