聚丙烯酰胺的反相微乳液聚合研究

Inverse microemulsion polymerization of acrylamide at high monomer concentrations

在配方主体确定的情况下,研究了引发剂浓度、聚合前通氮除氧时间、聚合降温后持续反应温度及时间等次要因素对丙烯酰胺反相微乳液聚合的影响。正交实验方案结果表明,引发剂浓度及聚合前通氮除氧时间是影响产物相对分子质量和稳定性的主要因素,聚合降温后持续反应温度及时间是影响单体转化率的主要因素;最佳方案如下:引发剂浓度为2 g/L,聚合前通氮除氧时间为15 min,聚合降温后40℃持续反应,持续反应时间1 h。根据最佳方案制得了固含量37.0%、相对分子质量12.8×106的稳定、速溶的聚丙烯酰胺微乳液。

Under the determined main components of formulation,the influence of secondary factors such as the initiator concentration,the nitrogen time before polymerization,the continuous temperature and time after polymerization reaction cooling down on the inverse microemulsion polymerization of acrylamide were investigated.Orthogonal experiment results showed that the polymer molar masses and product stability were influenced by the initiator concentration and nitrogen time before polymerization,and the monomer conversion was influenced by the continuous temperature and time after polymerization reaction cooling down;The best strategy is as follows： the initiator for 2 g/L,the nitrogen time before polymerization for 15 min,the continuous temperature after polymerization reaction cooling down for 40 ℃,and continuous reaction time 1 h.According to the best strategy,high solid-content（37.0%）,high molecular mass（12.8×106）,stabilized and instant polyacrylamide microemulsion was obtained.