Structure and Chemical Interactions at Model Polymer Interfaces

模型聚合物界面的结构和化学相互作用

• 批准号: 9001270
• 负责人: David Allara
• 金额: $ 26.62万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9001270&HistoricalAwards=false
• 关键词: Structure; Chemical; Interactions; Model; Polymer

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.

化学相互作用与有机基团的结构特征 在聚合物界面将详细研究的组合 薄膜模型界面结构的合成， 应用多种光谱技术。 最 重要的相互作用是弱的，化学上 特定的键，特别是布朗斯台德酸碱相互作用 包括官能团如羧酸，酰胺， 胺、羟基、酯和酮。 模型有机/有机 将构建界面， 与平面衬底接触的单层厚度 用极性有机基团的有序阵列官能化， 明确的方向。 聚合物覆盖层将通过以下方式形成： 类平衡溶液沉积。 表征 分子结构和化学相互作用将被监测 主要（但不限于）通过红外振动 光谱学、光学光谱椭圆偏振法和石英 晶体微量重量法 数据将被定量 分析了组间的相互作用次数， 界面，基团的取向和构象， 聚合物主链单元、膜的整体形态 （密度变化和地形）和热力学的 吸附过程 将据此得出以下结论： 初始基底表面、聚合物链 结构，以及最终的界面结构。 从长远 这项工作应有助于准确预测 吸附聚合物膜的界面行为和性质， 并且应该为测试理论提供定义明确的系统。