论文部分内容阅读
以对正丁基苯乙烯(nBS)、对乙烯基苯磺酸钠(SSS)和丙烯酰胺(AM)为原料,采用自由基胶束聚合法合成了阴离子型三元疏水缔合聚合物PAnBS,用红外光谱法、紫外光谱法以及核磁共振氢谱法对共聚物的结构进行了表征;考察了不同反应条件对共聚物溶液表观黏度的影响,得到了具有较强增黏能力的聚合物合成工艺条件:nBS、SSS和引发剂用量分别为总单体摩尔分数的1.5%、9%和0.1%,总单体和表面活性剂十二烷基硫酸钠(SDS)在溶液中的质量分数分别为25%和6%,反应温度50℃,反应时间10 h。与相对分子质量(简称分子量,下同)1 970万、水解度19.43%的超高分子量部分水解聚丙烯酰胺(HPAM)相比,所得PAnBS在NaCl或CaCl2水溶液中具有更强的增黏能力;PAnBS在淡水或盐水溶液中于80℃下的耐老化性能优于超高分子量HPAM,表现出优良的耐温抗盐性能。
Anionic ternary hydrophobically associating polymer PAnBS was synthesized by free radical micellar polymerization using nBS, sodium p-toluenesulfonate (SSS) and acrylamide (AM) as raw materials. The structure of the copolymer was characterized by IR, UV and 1H NMR spectra. The effects of different reaction conditions on the apparent viscosity of the copolymer solution were investigated. The polymer with strong tackifying ability was synthesized The technological conditions: the amount of nBS, SSS and initiator were respectively 1.5%, 9% and 0.1% of the total monomer mole fraction, the mass fraction of total monomer and surfactant sodium dodecyl sulfate (SDS) 25% and 6%, the reaction temperature was 50 ℃, the reaction time was 10 h. Compared with HPAM, which has a relative molecular mass of 19.73 million and a degree of hydrolysis of 19.43%, the obtained PAnBS has stronger tackifying ability in NaCl or CaCl2 aqueous solutions. The anti-aging properties of PAnBS at 80 ℃ in freshwater or brine solution are superior to that of ultra-high molecular weight HPAM, showing excellent temperature and salt resistance.