N,N—二甲氨基亚甲基丙烷酰胺—过硫酸钾引发丙烯酰胺聚合的研究

STUDIES ON POLYMERIZATION OF ACRYLAMIDE INITIAED BY COMBINATION OF N, N-DIMETHYLAMINOMETHYLENE—ACRYLAMIDE WITH POTASSIUM PERSULFATE

研究了N,N-二甲氨基亚甲基丙烯酰胺(DMAAM)—过硫酸钾体系引发丙烯酰胺聚合反应动力学,得到聚合反应速度方程式为: R_p=K_pC(DMAAM)^(0.5)c(K_2S_2O_8)^(0.5)c(AM) 测定出表观活化能为29.95kJ·mol^(-1)。通过实验,证实了DMAAM具有引发和参加反应的双重功能,能加快聚合速度,并得到相对分子质量上千万的产物,但相对分子质量分布较宽。还研究了某些添加剂对相对分子质量及其分布的影响。

The polymerization of acrylamide(AM) initiaed by the combination of n, n-dimethylaminomethylene-acrylamide(DMAAM) with potassium persulfate was studied kinetically. The rate equation was given as: R_p=K_pc(DMAAM)^(0.5)c(K_2S_2O_8)^(0.5)c(AM) The overall activation energy was determined to be 29.95 KJmol^(-1). DMAAM showed not only joined the redox initiation but also incorporated into the polymer chains. So that, the super high molecular weight 10~7 of polyacrylamide was obtained but molecular weight distribution was broad. We also studied that some of additives on molecular weight and its distribution effect.