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The selectivity of poly(2-vinylpyridine-block-methyl methacrylate) copolymer films: an AFM study

机译：聚（2-乙烯基吡啶-嵌段-甲基丙烯酸甲酯）共聚物薄膜的选择性：AFM研究

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摘要

In this study, the surface morphologies of poly(2-vinyl pyridine- block -methyl methacrylate), P(2VP-MMA), copolymer films were analyzed by atomic force microscopy. P(2VP-MMA) samples varying in total molar mass and individual block length were evaluated for variations in the surface morphologies of films cast from toluene on Si wafers. The incorporation of AuNPs into the polymer domain significantly influenced the surface morphology of the films. Variations in the surface morphology as a function of the polarity of the casting solvent were also examined. In this context toluene (a non-polar solvent), chloroform (of intermediate polarity) and ethyl acetate (a polar solvent) were employed as casting solvents. Toluene is a good solvent for PMMA compared to P2VP, chloroform has no preferential solvation, while ethyl acetate is a good solvent for P2VP compared to PMMA. The morphology of the films cast on substrates of distinctly different polarities, such as mica, Si wafers, and HOPG, were studied to appraise their selectivity. Finally, a detailed study of the effects of thermal annealing on the surface morphologies of P(2VP-MMA) and P(2VP-MMA)-AuNPs was conducted.
机译：在这项研究中，通过原子力显微镜分析了聚（2-乙烯基吡啶-嵌段-甲基丙烯酸甲酯），P（2VP-MMA），共聚物薄膜的表面形貌。评估了总摩尔质量和单个嵌段长度不同的P（2VP-MMA）样品的硅片上由甲苯浇铸的薄膜的表面形态变化。 AuNPs掺入聚合物结构域显着影响了薄膜的表面形态。还检查了表面形态随浇铸溶剂极性的变化。在这种情况下，使用甲苯（非极性溶剂），氯仿（中等极性）和乙酸乙酯（极性溶剂）作为浇铸溶剂。与P2VP相比，甲苯是PMMA的良好溶剂，氯仿没有优先的溶剂化作用，而与PMMA相比，乙酸乙酯是P2VP的良好溶剂。研究了在极性截然不同的基材（例如云母，硅片和HOPG）上浇铸的薄膜的形态，以评估其选择性。最后，详细研究了热退火对P（2VP-MMA）和P（2VP-MMA）-AuNPs表面形貌的影响。

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