反相乳液共聚合制备两性丙烯酰胺共聚物的研究

采用Span80-Tween80复合乳化剂和AIBA引发剂,进行丙烯酸钠(NaAA)/丙烯酰胺(AM)/丙烯酰氧基乙基三甲基氯化铵(DAC)反相乳液共聚合.研究了聚合温度、引发剂用量、单体浓度、共聚单体中DAC和AM含量、乳化剂用量及其HLB值、水/油比和水相pH值等聚合反应工艺条件或参数对聚合反应单体转化率和聚合物特性粘度的影响,聚合物特性粘度随引发剂用量和单体浓度的增大而增大的实验结果证实了该两性丙烯酰胺共聚物反相乳液制备过程中凝胶效应的存在.傅立叶红外光谱组成分析表明了两性丙烯酰胺共聚物的成功合成,扫描电镜观测乳胶粒粒径范围在0.6~8.0μm.

PREPARATION OF AMPHOTERIC POLYACRYLAMIDE BY INVERSE EMULSION COPOLYMERIZATION

Inverse emulsion copolymerization of sodium acrylate(NaAA),acrylamide(AM),and acryloyloxyethyl trimethylammonium chloride(DAC)was investigated,using Span80-Tween80 as complex emulsifier and 2,2′-azobis-(2-amidinopropen)-dihydrochloride(AIBA) as initiator.The effects of polymerization temperature,initiator dosage,monomer concentration and composition of both DAC and AM,emulsifier content and HLB value,oil/water ratio,aqueous pH value on the polymerization conversion and the polymer intrinsic viscosity were studied.During the preparation process of the amphoteric polyacrylamide,the gel effect was evident from the increase of polymer intrinsic viscosity with increasing initiator dosage and comonomer concentration.The latex particle size of the amphoteric polyacrylamide emulsion was observed with a scanning electron microscope,and the structure of the amphoteric polyacrylamide was identified by FTIR spectroscopy.