Microlayer Polymeric Composites

许多实施例说明了聚合物膜与聚合物膜的共挤出是如何进行的。 经济地使用三层或更多层来实现期望的 混合最终用途特征。 层的最新发展- 倍增装置允许连续处理片材或薄膜 具有数百或数千个两层或多层的交替层 聚合物和共挤出技术创造了新的机会。 由于需要新的加工技术， 不相容聚合物的工程微结构， 计划将制定研究的独特优势，可以 通过这个多功能的过程来实现。 新现象是 随着层厚度从宏观尺度减小， (tens微米级）到微米级（几微米）， 到纳米级（几十纳米）。 的复杂行为 这些复合系统将在交互方面进行分析， 结构层次，特别考虑到效果 层厚度和层间粘附力的影响。 的潜力 增强的机械性能只是一种可能性; 用多种材料制造薄膜和片材的可行性 功能，包括不寻常的光学或电子特性， 似乎是有可能的 该补助金由材料研究部门共同资助。 机械和结构系统。

Numerous examples illustrate how coextrusion of polymeric film with three or more layers is economically used to achieve a desirable mix of end-use characteristics. The recent development of layer- multiplying devices permits continuous processing of sheet or film with hundreds or thousands of alternating layers of two or more polymers and creates new opportunities for coextrusion technology. Motivated by the need for new processing technologies for creating engineered microstructures of incompatible polymers, a research program will be developed to study the unique advantages that can be achieved with this versatile process. New phenomena are expected as the layer thickness is decreased from the macroscale (tens of microns) to the microscale (several microns) and finally to the nanoscale (tens of nanometers). The complex behavior of these composite systems will be analyzed in terms of interactive hierarchical levels of structure with particular regard to effects of layer thickness and adhesion between layers. The potential for enhanced mechanically properties is only one possibility; the feasibility of creating film and sheet materials with multiple functions, including unusual optical or electronic properties, seems possible. This grant is jointly funded by the Divisions of Materials Research and of Mechanical and Structural Systems.