微波辅助法合成高分子量聚丙烯酰胺

摘要

Using acrylamide (AM) as monomer,water as solvent,ammonium persulphate (APS) and 2,2'-azobis [2-methylpropionamidine] dihydrochloride (AIBA) as composite initiator system,polyacrylamide (PAM) was prepared by microwave assisted method.The effect of microwave irradiation power,irradiation time,monomer concentration and initiator concentration on the molecular weight and monomer residue rate of polyacrylamide was studied.The structure of polymer was characterized by IR,and the effect of shearing on the properties of PAM was studied.The results show that the PAM reaction time is short,the energy consumption is low,the molecular weight is high,and the residue rate is low;When the microwave power is 100 W,irradiation time is 8 min,monomer concentration is 25％,initiator dosage is 0.05％,the molecular weight of the product can reach 1 050×104and the amount of residual monomer is low;The degradation of PAM can be accelerated with the increasing of shear time and shear rate.%以丙烯酰胺(AM)为单体,水为溶剂,过硫酸铵(APS)和偶氮二异丁基脒盐酸盐(AIBA)为复合引发体系,采用微波辅助法制备聚丙烯酰胺(PAM).研究了微波辐照功率、辐照时间、单体浓度、引发剂用量对聚丙烯酰胺分子量和单体残留率的影响,采用红外光谱(FT-IR)表征了聚合物产物结构,最后考察了剪切作用对PAM性能的影响.结果表明:采用微波辅助法制备的PAM反应时间短、能耗低、分子量高、单体残留率低;当微波功率为100 W,辐照时间为8 min,单体浓度为25％,引发剂用量为0.05％时产物分子量可达1050×104,并且单体残余量低;PAM的降解随着剪切时间的延长和剪切速度的加快而加快.