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通过溶液折光指数和粘度测定 ,研究了聚丙烯酸 (PAA)与聚氧化乙烯 (PEO)高分子链间在复合溶液中的相互作用和 PAA/ PEO高分子氢键复合溶液的结构与粘度 ,研究了复合溶液粘度随溶液 p H值的变化规律及不同浓度时剪切速率对复合溶液粘度和复合增粘效果的影响。结果表明 :PAA/ PEO复合溶液结构不同于PAA和 PEO两组分聚合物溶液结构 ,PAA与 PEO高分子链间的氢键相互作用形成构象更为伸展、流体力学体积更大的 PAA/ PEO氢键复合物 ,导致溶液粘度升高 ,复合增粘效果极为显著。通过高分子间分子复合可在较低分子量和较低聚合物浓度下获得较高粘度的聚合物溶液 ,是制备聚合物增稠剂的有效途径。
The refractive index and viscosity of the solution were used to study the interaction between polyacrylic acid (PAA) and poly (ethylene oxide) (PEO) in the composite solution and the structure and viscosity of the PAA / PEO hydrogen bonding complex solution. The influence of the viscosity of the composite solution on the p H value of the solution and the shear rate at different concentrations on the viscosity of the composite solution and the viscosifying effect of the composite solution. The results show that the structure of PAA / PEO composite solution is different from that of PAA and PEO. The hydrogen bonding interaction between PAA and PEO chains is more extended and the hydrodynamic volume of PAA / PEO Key complex, resulting in solution viscosity, complex viscosifying effect is extremely significant. Polymer intermolecular complex can be obtained at lower molecular weight and lower polymer concentration higher viscosity polymer solution is an effective way to prepare polymer thickener.