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以二甲基二烯丙基氯化铵和丙烯酰胺为原料,采用过硫酸铵-亚硫酸氢钠引发体系,采取一次性加料方法,分步升温工艺,以特征黏度为主要考核指标,对5%阳离子度二甲基二烯丙基氯化铵与丙烯酰胺的共聚物PDA进行了制备工艺优化研究.研究了单体质量分数、聚合反应温度、Na4EDTA用量、引发剂用量和熟化温度等对产物特征黏度的影响.得到的最佳工艺条件是:单体质量分数(以反应液总质量计)为16%,聚合反应温度40℃,Na4EDTA质量分数(以单体质量计)为2.0×10-4,引发剂质量分数(以单体质量计)为7.4×10-4,熟化温度为60℃,产物PDA特征黏度为19.4 dL/g;同时采用傅立叶变换红外光谱和核磁共振技术对PDA进行了结构表征.
With dimethyldiallylammonium chloride and acrylamide as raw materials, the use of ammonium persulfate - sodium bisulfite initiator system, a one-time feeding method, step-by-step heating process, the characteristic viscosity as the main assessment indicators, the 5 % Cationic dimethyldiallylammonium chloride and acrylamide copolymer PDA to optimize the preparation process.The monomer mass fraction, polymerization temperature, the amount of Na4EDTA, the amount of initiator and aging temperature of the product The results showed that the optimum conditions were as follows: the monomer mass fraction (based on the total mass of the reaction solution) was 16%, the polymerization temperature was 40 ℃, the mass fraction of Na4EDTA (based on the monomer mass) was 2.0 × 10- 4, the initiator mass fraction (based on the monomer mass) of 7.4 × 10-4, aging temperature of 60 ℃, the product of PDA intrinsic viscosity of 19.4 dL / g; at the same time using the Fourier transform infrared spectroscopy and nuclear magnetic resonance technology PDA Structure Characterization.