Synthesis and Characterization of Functionalized Polyethylene Surfaces

利用嵌段冷却剂的捕获功能化和自由基前驱体的捕获功能化，正在开发合成接枝到聚乙烯上的薄膜的新方法。通过在这些表面结合ESR、荧光和紫外可见光谱标记，正在研究质子化和离子交换等反应，以及接枝低聚物的结构相对于其溶液对应物如何影响此类反应。另外，使用结构和立体化学探针的实验检验了这种界面对反应的影响，例如在羰基碳上的亲核取代反应。其他分析技术的组合，包括接触角测量、质谱学、电子显微镜和核磁共振，也被用于表征正在制备的齐聚物和聚合物材料。此外，还对这些接枝聚烯烃的形态稳定性进行了研究，并将研究利用外部表面预组织和提高包埋功能化的表面选择性的可能性。

New methods are being developed for synthesis of thin films grafted onto polyethylene using entrapment functionalization of block cooligomers and entrapment functionalization of radical precursors. By incorporating ESR, fluorescence and UV-visible spectroscopic labels at these surfaces, reactions like protonation and ion exchange are being examined and is how the structure of the grafted oligomer affects such reactions relative to their solution counterparts. Additional experiments using structural and stereochemical probes examine the effect of such interfaces on reactions such as nucleophilic substitution at carbonyl carbons. A combination of other analytical techniques including contact angle measurements, mass spectroscopy, electron microscopy, and NMR also being used to characterize the oligomeric and polymeric materials being prepared. In addition, a study carried out of the morphological stability of these grafted polyolefins and will study the possibility that we can employ external surfaces to preorganized and enhance the surface selectivity of entrapment functionalization.