新型疏水缔合水溶性聚合物的合成及溶液性能研究

Synthesis and Properties of a Novel Hydrophobically Associating Water-soluble Copolymer

以十八碳醇、TDI和丙烯酸为原料制备了一种带苯基和长链烷基的N -取代丙烯酰胺类疏水单体NSAM。该单体和丙烯酰胺以单体比n(NSAM)∶n(AM )为 0 75∶99 2 5 ,采用自由基胶束共聚合成了一种疏水缔合水溶性高分子AM -co -NSAM。研究了AM -co -NSAM在NaCl、KCl、BaCl2 、CaCl2 溶液中比浓黏度的盐效应 ;初步探讨了不同盐溶液、不同盐浓度对大分子之间相互作用的影响。实验结果表明 :在不同盐溶液中 ,AM -co -NSAM都表现出盐增黏效应 ,其二价盐的影响较一价盐显著 ;随着盐质量浓度的升高 ,特性黏数 [η]下降且低于纯水中的相应值 5 84 1dL/g ,而Huggins常数KH 增大且高于 0

N-substituted-acrylamide hydrophobical monomer was prepared with the materials of 18 carbon alcohol, TDI and acrylic acid. A hydrophobically associating water-soluble copolymer was prepared by the radical micellar copolymerization from the acrylamide monomer and small amount of NSAM (0 75mol%). Effects of concentrations of different species of chloride solutions on η of hydrophobically associating water-soluble copolymer were studied. In addition, the effects of the type and the concentration of salts on intrinsic viscosity and Huggins constant was investigated. Experimental results showed that the viscosity increased with salt concentration increasing, which was more obvious for bivalent salts than for monovalent salts. Intrinsic viscosity descended with salt concentration increasing and was lower than 5 841?dL/g in water, and Huggins constants increased and were over 0 3.