The composition, thickness and properties of poly(4-vinylpyridine-co-oligo(ethylene glycol)ethyl ether methacrylate246) [P(4VP-co-OEGMA246)] copolymer grafted brush coatings attached to glass were studied in the dry and swollen states using ellipsometry. These measured data are in good agreement with predicted (estimated) changes in the amount of water, refractive index and thickness of the grafted copolymer brush coatings on swelling. For POEGMA brushes the thickness of the coatings on swelling at 20 °C can be more than double, in contrast to P4VP where those changes are insignificant. The presence of 4VP units in the structure of the P(4VP-co-OEGMA246) copolymer grafted brushes significantly decreases the hydration degree even for coatings with very low concentrations of 4VP units.

中文翻译：

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椭圆偏振法测定的接枝共聚物刷涂层的组成，厚度和性能：计算和预测†

研究了附着在玻璃上的聚（4-乙烯基吡啶-共-低聚（乙二醇）乙基甲基丙烯酸甲酯[P（4VP- co- OEGMA246）]）共聚物接枝涂层的组成，厚度和性能，使用椭圆仪。这些测量数据与溶胀时接枝共聚物刷涂层的水量，折射率和厚度的预测（估计）变化非常吻合。对于POEGMA刷子，在20°C时膨胀的涂层厚度可以增加一倍以上，而P4VP则变化不明显。P（4VP- co-OEGMA246）共聚物接枝刷，即使对于浓度非常低的4VP单元的涂料，也显着降低了水合度。