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本文建立了用于嵌段共聚物胶束体系定量计算的标度理论模型,讨论了标度理论与均匀场模型的差异。在极性和非极性溶剂体系中,定量考察了平衡态胶束聚集数、胶束过渡区聚合物浓度分布、胶束半径和内界面处的聚合物浓度等平衡性质, 以及嵌段共聚物嵌段比例、摩尔质量等因素对上述性质的影响。与实验及均匀场模型的对比结果显示,均匀场模型的拟均相假设对胶束聚集数等平衡性质的计算不会产生显著偏差,标度理论模型与均匀场模型都能够较好地描述胶束体系,两模型也获得了较好的一致。此外,标度理论模型能够给出胶束内的浓度分布。即使在高聚集数的情况下,胶束内界面处溶剂的含量仍然很高(>50％),这表明有必要对内界面张力的计算进行修正,而均匀场模型则忽略了此项修正。
In this paper, a scale theoretical model for the quantitative calculation of micellar block copolymers was established. The differences between the scale theory and the uniform field model were discussed. In polar and nonpolar solvent systems, the equilibrium properties of equilibrium micelle aggregation number, micellar transition region polymer concentration distribution, micelle radius and polymer concentration at the interface were investigated quantitatively, and the block copolymers Block ratio, molar mass and other factors on the above properties. Compared with the experimental and uniform field models, the quasi-homogeneous hypothesis of homogeneous field model does not cause any significant deviation in the calculation of the equilibrium properties such as the number of micelles, and both the scale theoretical model and the uniform field model can well describe the gel Beam system, the two models also get better agreement. In addition, the scale theory model gives the intra-micellar concentration profile. Even at high agglomeration numbers, the solvent content at the micellar interface remains high (> 50%), indicating that it is necessary to correct the calculation of the interfacial tension while the uniform field model neglects this correction.