Development of Layer-Multiplying Technology for Continuous Processing of Polymers into Microlayers and Nanolayers

DMR-9503941希尔特纳提出了一种层叠技术，该技术将弹性仪、热塑性塑料和复合材料加工成具有成百上千层交替的薄膜。利用这项技术，两种聚合物从挤出机被送入喂料块，作为平行层，然后进入模具，该模具分裂、扩散和重组熔体。通过添加第三种OtieO聚合物，可以将任意数量的模具元件串联组合以产生双组分多层结构或三组分多层结构。基础研究课题包括聚合物增容机理和界面形成机理。随着单层厚度变得与聚合物分子的大小相当，高界面体积比带来的新现象和新特性是可以预期的。需要新的加工技术来创造不相容聚合物的工程化微结构。将在凯斯西储开发的加工设施将使其有可能探测到学术界和工业界感兴趣的各种多层成分。这种共挤出技术可能会产生具有独特韧性和渗透性的层状聚合物。

DMR-9503941 Hiltner A layer-multiplying technology is proposed that will process elastometers, thermoplastics, and composites into sheets of films with hundreds or thousands of alternating layers. With this technology, two polymers are fed from extruders into a feed block as parallel layers, and then into a die that splits, spreads, and recombines the melt. Any number of die elements can be combined in series to produce two- component multilayered structures, or three-component multilayered structures by adding a third OtieO polymer. Fundamental research topics include mechanisms of polymer compatibilization and of interface formation. As the individuial layer thickness becomes comparable to the size of the polymer molecule, new phenomena and properties arising from the high interface to volume ratio are anticipated. There is a need for new processing technologies to create engineered microstructures of incompatible polymers. The processing facility to be developed at Case Western Reserve will make it possible to scout a wide range of multilayered compositions of interest to the academic as well as to the industrial communities. The co-extrusion technology can potentially produce layered polymers with unique toughness and permeability characteristics.