Reconciling STEM and SAXS for Ionomer Morphologies

同分异构体是含有大部分非极性单体单元和少量(~5-10摩尔%)极性单体单元的无规共聚物，通常是酸。酸基可以与阳离子部分或完全中和，以产生离子物种，这些离子物种自组装形成离子纳米聚集体。除了耐化学性的热塑性塑料、坚韧的涂层、燃料电池的渗透选择膜和食品包装材料等目前的工业兴趣外，还设想了各种新技术。Wineys对这些材料的研究重点是使用先进的电子显微镜方法直接对离子聚集体进行成像，以便对合成、加工、形态和众多物理性能之间的相互关系提供至关重要的见解。研究的重点是寻求由扫描电子显微镜(STEM)收集的真实空间图像和由小角X射线散射(SAXS)收集的倒易空间图案之间的一致性。将使用模型材料。提出的研究分为三个部分：STEM和SAXS技术的进一步完善。用过渡金属中和的聚(苯乙烯-甲基-丙烯酸)共聚物和用过渡金属中和的聚(乙烯-甲基-丙烯酸)共聚物。离聚体是一类塑料，目前被用作耐化学腐蚀的塑料、燃料电池的坚韧涂层(高尔夫球)和食品包装材料，并设想了各种新技术，如防止化学战。为这些应用设计更好的离聚体需要了解结构、加工和性能之间的相互依赖关系。WINEY正在使用先进的电子显微镜和标准的X射线散射工具来表征离聚体的纳米级结构。工业、学术和军事科学家对Wines协调显微镜和离聚体散射数据的努力特别感兴趣，因为在成功协调的情况下，更广泛的社区随后可以满怀信心地依赖更快的散射方法。提供这些信息将使科学家和工程师能够更好地建立相互依赖关系，并设计出改进的材料。WINEY将继续接受鼓励女性参与科学和工程领域的演讲活动。

Isonomers are random copolymers with a majority of non=polar monomeric units and a minority (~5-10 mol%) of polar monomeric units, typically acids. The acid groups can be partially or fully neutralized with cations to create ionic species that self assemble to form ionic nanoaggregates. In addition to their current industrial interest as chemically resistant thermoplastics, tough coatings, permselective membranes for fuel cells, and food packaging materials, a variety of new technologies are envisioned. Wineys work with these materials focused on directly imaging the ionic aggregates using advanced electron microscopy methods, so as to provide vital insight to the interrelationships between synthesis, processing, morphology and numerous physical properties. The focus of the proposed research is to seek reconciliation between real space images collected by scanning transmission electron microscopy (STEM) and reciprocal space patterns collected by small angle x-ray scattering (SAXS). Model materials will be employed. The proposed research is divided into three segments: further STEM and SAXS technique refinements. Poly(styrene-ran-methacrylic acid) copolymers neutralized with transition metals, and poly(ethylene-ran-methacrylic acid) copolymers neutralized with transition metals.%%%Ionomers are a class of plastics that are currently used as chemically resistant plastics, tough coatings (golf balls) permselective membranes for fuel cells, and food packaging materials, and a variety of new technologies are envisioned, e.g., protection against chemical warfare. Designing better ionomers for these applications requires understanding the interdependencies of structure, processing, and properties. Winey is characterizing the nanoscale structure of ionomers using advanced election microscopy and standard x-ray scattering tools. Industrial , academic and military scientists have a particular interest in Wineys efforts to reconcile microscopy and scattering data from ionomers, because in instances of successful reconciliation the wider community can subsequently rely on the faster scattering method with confidence. Providing this information will enable scientists and engineers to better establish the interdependencies and design improved materials. Winey will continue to accept speaking engagements that encourage the participation of women in science and engineering.