REU Supplement: Characterization of Polymer Interphases Using Surface-Enhanced Raman Scattering

REU 补充：使用表面增强拉曼散射表征聚合物界面

• 批准号: 8823071
• 负责人: F. James Boerio
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-01 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8823071&HistoricalAwards=false
• 关键词: REU; Supplement; Characterization; Polymer; Interphases

An innovative analytical technique known as surface-enhanced Raman scattering (SERS) is being used in combination with other surface analysis techniques for the non-destructive characterization of "interphases" formed when polymer systems are adsorbed onto or cured against metal substrates. SERS is being used to investigate the adsorption of block copolymers and mixtures of homopolymers onto substrates such as silver and copper. SERS is also being used to determine the effect that metal substrates have on the molecular structure of polymers cured against them. The goal is to obtain fundamental information regarding catalysis or inhibition of curing reactions by metals, configurations of polymers adsorbed onto metal substrates, preferential adsorption of components of polymer systems onto metals, mechanisms by which polymers and small molecules interact with metals, extent of cure as a function distance away from a metal surface and into a polymer cured against the metal, and migration of metal ions into polymers cured against metal substrates. Processes such as preferential adsorption of components of a polymer systems onto a substrate and catalysis or inhibition of reactions within the polymer by the substrate lead to the formation of an interphase in the polymer adjacent to the substrate that has chemical and physical properties distinct from those of the bulk polymer. Since the macroscopic properties of adhesive bonds and composites are controlled by the interphase, it is essential to determine and control the molecular structure of interphases. SERS is ideal for this purpose since it is inherently surface selective and does not require a polymer to be separated from a substrate for the interphase to be examined as do virtually all other surface analysis techniques. The results obtained are being used to tailor the molecular structure of interphases so as to obtain enhanced environmental stability in structural adhesive joints and composites.

一种被称为表面增强的创新分析技术 拉曼散射（Sers）正与 其他非破坏性表面分析技术 表征聚合物体系中形成的“界面” 被吸附到金属基底上或相对于金属基底固化。 Sers是 用于研究嵌段共聚物的吸附 和均聚物的混合物到基底上 和铜。 Sers也被用来确定 金属基底对分子结构的影响 聚合物对它们进行固化。 我们的目标是获得 关于催化或抑制的基本信息 金属固化反应、聚合物构型 吸附在金属基材上，优先吸附 聚合物系统的组成部分到金属上， 聚合物和小分子与金属相互作用， 固化作为远离金属表面的距离的函数， 对金属固化的聚合物，以及金属离子的迁移 聚合物在金属基材上固化。 过程，如优先吸附的成分， 聚合物系统在基质上的催化或抑制 在聚合物内的反应由基板导致 在聚合物中与聚合物相邻的中间相的形成 具有不同化学和物理性质的基质 与本体聚合物的那些不同。 由于宏观 粘合剂粘结和复合材料的性能由 因此，必须确定和控制 界面的分子结构 Sers是理想的 目的，因为它固有地具有表面选择性， 需要将聚合物与基底分离， 像实际上所有其它表面一样检查界面 分析技术。 所取得的成果正在用于 调整界面的分子结构， 增强结构胶接接头的环境稳定性 和复合材料。