Structure and Chemical Interactions at Model Polymer Interfaces

结合薄膜模型界面结构的合成和几种光谱技术的应用，详细研究了聚合物界面中有机基团的化学相互作用和结构特征。最重要的相互作用是弱的、化学特异性的键，特别是涉及羧酸、酰胺、胺、羟基、酯和酮等官能团的Bronsted酸碱相互作用。将构建模型有机/有机界面，将单层厚度的聚合物覆盖层与具有明确方向的极性有机基团的有组织阵列的平面衬底接触。聚合物覆盖层将通过类平衡溶液沉积形成。分子结构和化学相互作用的表征将主要（但不是唯一）通过红外振动光谱学、光学光谱椭偏仪和石英晶体微重量法进行监测。这些数据将用于定量分析界面上基团之间相互作用的数量，基团和聚合物主单元的取向和构象，薄膜的整体形态（密度变化和地形）以及吸附过程的热力学。由此得出初始衬底表面、聚合物链结构和最终界面结构之间的关系。从长远来看，这样的工作将有助于准确预测吸附聚合物薄膜的界面行为和性质，并为测试理论提供定义良好的系统。

Chemical Interactions and structural features of organic groups in polymer interfaces will be studied in detail by a combination of synthesis of thin-film model interface structures and application of several spectroscopic techniques. The most significant interactions of interest are weak, chemically specific bonds, particularly Bronsted acid-base interactions involving functional groups such as carboxylic acid, amide, amine, hydroxyl, ester, and ketone. Model organic/organic interfaces will be constructed that place polymer overlayers of monolayer thicknesses in contact with a planar substrate functionalized with organized arrays of polar organic groups of well-defined orientations. Polymer overlayers will be formed by equilibrium-like solution deposition. Characterization of the molecular structures and chemical interactions will be monitored primarily (but not exclusively) by infrared vibrational spectroscopy, optical spectroscopic ellipsometry, and quartz crystal microgravimmetry. The data will be quantitatively analyzed for the number of interactions between groups at the interface, the orientations and conformations of the groups and the polymer backbone units, the overall morphology of the film (density variations and topography) and the thermodynamics of the adsorption process. Conclusions will be drawn accordingly as to correlations between the initial substrate surface, polymer chain structure, and the final interfacial structures. In the long term, such work should contribute to accurate prediction of interfacial behavior and properties of adsorbed polymer films, and should provide well-defined systems for tests theory.