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将增黏用碳五石油树脂(C_5)作为疏水单体,与丙烯酰胺(AM)聚合反应得到AM/C_5二元共聚物,通过胺甲基化反应制得疏水聚合物Mannich碱。考察了单体质量比、引发剂用量、反应温度以及pH对聚合反应的影响;讨论了反应时间、反应温度以及溶液pH对Mannich碱溶液表观黏度的影响。采用FTIR、~1HNMR对产品进行结构表征,并对产品性能进行分析。结果表明,最佳聚合条件为:反应温度40℃,pH=8,引发剂用量为0.5%(以单体质量计),丙烯酰胺与碳五石油树脂的质量比为15∶1。当反应时间为5 h,温度60~70℃,pH=9,丙烯酰胺、甲醛、二甲胺的物质的量比为1∶1.1∶1.5,Mannich碱溶液黏度达到最佳(418 m Pa·s)。温度为90℃时,Mannich碱的黏度保留率为43.3%;当加入的NaCl、CaCl_2的质量浓度均为2 000 mg/L时,其黏度保留率分别为32.8%、21.7%。该Mannich碱具有较好的增黏、耐温及耐盐性。
The tackifier C 5 was used as a hydrophobic monomer to polymerize with acrylamide (AM) to obtain AM / C_5 binary copolymer, and the hydrophobic polymer Mannich base was obtained through amidation reaction. The effects of monomer mass ratio, initiator amount, reaction temperature and pH on the polymerization reaction were investigated. The effects of reaction time, reaction temperature and solution pH on the apparent viscosity of Mannich base solution were discussed. The product was characterized by FTIR and ~ 1HNMR, and the product performance was analyzed. The results showed that the optimal polymerization conditions were as follows: the reaction temperature was 40 ℃, pH = 8, the initiator was 0.5% (by mass), the mass ratio of acrylamide to C5 petroleum resin was 15:1. When the reaction time was 5 h, the temperature was 60 ~ 70 ℃, the pH was 9, the mass ratio of acrylamide, formaldehyde and dimethylamine was 1: 1.1: 1.5, the viscosity of Mannich base solution reached the best (418 mPa · s ). When the temperature was 90 ℃, the retention of viscosity of Mannich base was 43.3%. When the concentration of NaCl and CaCl2 added was 2 000 mg / L, the viscosity retention of Mannich base was 32.8% and 21.7% respectively. The Mannich base has better viscosity, temperature and salt tolerance.