Synthesis and application of hydrophobically associating cationic polyacrylamide

Journal of Shandong University Pub Date : 2008-01-01 DOI:10.14233/ajchem.2014.15948

Wang Yuan-fang

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引用次数: 2

Abstract

A series of hydrophobically associating cationic copolymers,poly(AM-DMDAAC-BA),were synthesized with acrylamide(AM),dimethyldiallyammonium chloride(DMDAAC) and butylacrylate(BA) by the micellar free radical copolymerization technique.Copolymerization was initiated by a complex initiation system,which was composed of a redox initiator(K2S2O8-Na2S2O3) and thermal decomposition initiator azobisisobutyronitrile(AIBN).The effects of synthesis conditions,such as various initiation systems,initiator concentration,monomer ratio,surfactant concentration and urea concentration on properties of polymers were studied.The results showed that conversion and molecular weight of polymer were increased with the use of the initiation system.The optimum conditions of copolymerization were as follows: the molar ratio of AM,DMDAAC and BA was 68.6∶29.4∶ 2.0,respectively and the percentages of initiator,surfactant and urea by weight in the monomers were 0.15%,2.0% and 2.5%,respectively.Infrared spectrogram of the copolymers proved the formation of hydrophobically associating cationic copolymers. The results of coagulation performance experiments indicated that the oil removal rate was significantly improved by using P(AM-DMDAAC-BA).

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疏水缔合阳离子聚丙烯酰胺的合成及应用

以丙烯酰胺(AM)、二甲基二烯丙酸铵(DMDAAC)和丁丙酸酯(BA)为原料，采用胶束自由基共聚技术合成了一系列疏水缔合阳离子共聚物聚(AM-DMDAAC-BA)。采用由氧化还原引发剂(K2S2O8-Na2S2O3)和热分解引发剂偶氮二异丁腈(AIBN)组成的复合引发体系引发共聚。研究了不同引发体系、引发剂浓度、单体配比、表面活性剂浓度和尿素浓度等合成条件对聚合物性能的影响。结果表明，该引发体系提高了聚合物的转化率和分子量。共聚的最佳条件为:AM、DMDAAC和BA的摩尔比分别为68.6∶29.4∶2.0，引发剂、表面活性剂和尿素的质量分数分别为0.15%、2.0%和2.5%。红外光谱图证实了共聚物形成疏水缔合阳离子共聚物。混凝性能实验结果表明，P(AM-DMDAAC-BA)的去除率显著提高。

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Journal of Shandong University

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