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采用光辅助引发技术,通过水溶液聚合法制备阳离子型丙烯酰胺(AM)-丙烯酰氧乙基三甲基氯化铵(DAC)-二甲基二烯丙基氯化铵(DMDAAC)共聚物P(AM-DAC-DMDAAC)。考察了两种阳离子单体配比、引发温度、溶液pH值、引发剂质量分数等因素对产物特性黏数及溶解性的影响,并对产物的絮凝性能进行了研究。结果表明,在m(DAC)∶m(DMDAAC)=1∶1、引发温度为15℃、pH=5、引发剂质量分数为0.003 0%时,所得聚合物的特性黏数达16.047 9 d L/g,溶解时间为40 min。在P(AM-DAC-DMDAAC)特性粘数12.110 2d L/g,用量为0.04%的条件下,污水的透光率96.00%,絮凝率76.04%,脱水率83.75%。
The cationic acrylamide (AM) -acryloyloxyethyltrimethylammonium chloride (DAC) -dimethyldiallylammonium chloride (DMDAAC) copolymer P was prepared by aqueous solution polymerization (AM-DAC-DMDAAC). The effects of the ratio of the two cationic monomers, the temperature, the pH value of the solution and the mass fraction of the initiator on the intrinsic viscosity and solubility of the product were investigated. The flocculation performance of the product was also studied. The results showed that the intrinsic viscosity of the obtained polymer reached 16.047 9 d L at a molar ratio of DAC (DMDAAC) = 1: 1, an initiator temperature of 15 ℃, pH = 5 and an initiator mass fraction of 0.003% / g, the dissolution time is 40 min. Under the condition of P (AM-DAC-DMDAAC) intrinsic viscosity of 12.110 2d L / g and the dosage of 0.04%, the light transmittance of wastewater was 96.00%, the flocculation rate was 76.04% and the dehydration rate was 83.75%.