部分水解聚丙烯酰胺共混体溶液的黏性和弹性研究

Study on Aqueous Solution Viscosity and Elasticity of Blends of Commercial Partially Hydrolyzed Polyacrylamides with Different Relative Molecular Mass

实验研究了大庆工业品HPAM聚合物三元共混体溶液的黏性和弹性。用0.241%NaCl盐水配制溶液,以1.0 g/kg溶液45℃、7.34 s-1黏度表征溶液黏性,以45℃储能模量-频率关系和拉伸细丝直径-时间关系表征溶液弹性。共混聚合物的平均相对分子质量m由工业品聚合物的η按质量权重平均法计算。由η在5.0×106-3.8×107、HD=23%的8种聚合物混配的m=2.5×107的6个三元共混聚合物,[η]和溶液黏度均低于η=2.5×107的单一聚合物,其中低η聚合物组分含量高时[η]和黏度更低,但除了[η]和黏度最低的2个共混体外,溶液弹性均高于单一聚合物。由η为1.5×107、2.8×107、3.3×107的3种聚合物混配的m=2.8×107的5个共混聚合物,[η]和黏度与η=2.8×107的单一聚合物相当,弹性则在不同程度上得到改善。由此得到结论:在等基础上与单一聚合物相比,工业品聚合物共混体在聚合物η和混配比例适当时,其增黏性能不降低而溶液弹性提高。图5表2参8。

The solution viscosity and elasticity are investigated for tri-component blends of Daqing s commercial HPAM polymers.The polymer blend solutions are prepared in 0.241% NaCl solution,their viscosity is determined at 45℃ and 7.34 s-1,their elasticity is characterized by storage modulus vz frequence and extensional filament diameter vz time curves at 45℃.The of polymer blends,m,is calculated from the η of component polymers by using mass weighted averaging method.For 6 tri-component polymer blends of m=2.5...