两性疏水缔合聚丙烯酰胺的合成及性能

Synthesis and Performance Evaluation of Amphoteric Hydrophobic Association Polyacrylamide

摘要:

以丙烯酸（AA）、丙烯酰胺（AM）、2-丙烯酰胺基八烷基磺酸（HAMC8S）和二甲基二烯丙基氯化铵（DMDAAC）为单体，合成了含有疏水碳链、磺酸基以及季铵盐等活性基团的两性疏水缔合聚丙烯酰胺（HAPAM）AA/AM/AMC8S/ DMDAAC，相对分子质量为5.5×106，并通过红外光谱和1H-NMR对其结构进行了表征。研究得到反应的最佳条件为：ω（总单体）= 30%，ω（引发剂）= 0.10%（以单体总量计），反应温度为55 ℃，反应时间为5 h，产率为84%。同时研究表明，温度为80 ℃时，黏度保留率达66%以上；盐度为8%时，黏度保留率达75%以上；剪切作用时间为240min时，黏度有所增加，这些性能都远大于相同条件下均聚聚丙烯酰胺（HPAM）黏度保留值。

Abstract:

The amphoteric hydrophobic association polyacrylamide (HAPAM), AA/ AM/ AMC8S/ DMDAAC, with hydrophobic carbon chain, sulfonic group and quaternary ammonium group was synthesized using AM, DMDAAC and AMC8S as monomers, the average molecular weight was 5.5×106, The structure was characterized by infrared spectrum and 1H-NMR. Based on the researches of monomer conversion and molecular weight, the optimum reaction conditions were obtained: ω(monomer concentration)= 30%, ω (initiator) = 0.1% (based on the total amount of the monomers), reaction temperature 55 ℃, reaction time 5 h and productivity 84%. At the same time, the results showed that when temperature was 80℃, viscosity reserved rate was more than 66%, salinity was 8%, viscosity reserved rate was more than 75%, shear-resistant time was 240 min, viscosity reserved rate increased. These performances were better than HPAM.