微波辐射法合成阴离子型聚丙烯酰胺

Synthesis of Anionic Polyacrylamide under Microwave Irradiation

以丙烯酰胺(AM)和丙烯酸钠(AA-Na)为原料,过硫酸铵为引发剂,N,N-亚甲基双丙烯酰胺为交联剂,用微波辐射进行水溶液聚合制备可溶解的阴离子型聚丙烯酰胺。探讨丙烯酸中和度、单体浓度、引发剂用量、交联剂用量及温度等对相对分子质量的影响。结果表明,单体浓度为19%,中和度为80%,引发剂用量为0.05%,交联剂用量为0.002%,反应温度35℃条件下合成的聚丙烯酰胺(PAM)的相对分子质量最高。

The soluble anionic polyacrylamide was synthesis by aqueous solution polymerization under microwave irradiation,the acrylamide and sodium acrylate were used as the monomers,the ammonium persulfate was used as an initiator and the N,N-methylene-bis-acrylamide was adopted as a crosslinking agent.The effect of neutralization degree of AA,monomer concentration,dosage of crosslinking agent and initiator,and the reaction temperature on the molecular weight were discussed.The optimum reaction conditions were found as follows： the monomer concentration was 19%,the neutralization degree of AA was 80%,the initiator dosage was 0.05%,the crosslinking agent dosage was 0.002% and the reaction temperature was 35℃.Under these conditions,the polyacrylamide with highest molecular weight was obtained.