Direct Observation of Polymer Chain Packings in Polymer Monolayers

聚（甲基丙烯酸甲酯）（PMMA）/聚（丙烯酸正壬酯）共混单分子膜是一个可混溶的系统，如果少量的PMMA链溶解在PNA单分子膜中，孤立的PMMA链在PNA单分子膜中，第一次，成功地通过原子力显微镜可视化。的PMMA链溶解在PNA单层缩放的PMMA分子量的幂为0.63的回转半径，但在很宽的范围内的矩阵PNA的分子量是独立的。这些结果表明，PNA/PMMA单分子层是一个强互溶系统，虽然缩放，0.63与PMMA分子量是略小于二维良溶剂系统的值（0.75）。

Poly(methyl methacrylate)(PMMA)/poly(n-nonyl acrylate) blend monolayer was a miscible system, and if a small amount of PMMA chains was solubilized in a PNA monolayer, the isolated PMMA chains in the PNA monolayer were, for the first time, successfully visualized by atomic force microscopy. The radius of gyration of the PMMA chain solubilized in the PNA monolayer scaled with the PMMA molecular weight in a power of 0.63, but was independent on the molecular weight of the matrix PNA over a wide range. These results indicate that the PNA/PMMA monolayer is a strongly miscible system, although the scaling, 0.63 with the PMMA molecular weight is slightly smaller than the value for two-dimensional good solvent system (0.75).