聚合物在受限层空间中的形态结构演变及相关性能研究进展

自然界中的层状有序结构如强韧的贝壳、树木等,往往带来优异的性能或特殊的功能。作为仿生材料学在高分子加工成型技术中的应用,聚合物微纳层共挤出技术是通过特殊的流道设计对聚合物熔体进行多次强制分割叠加,来制备高性能交替多层聚合物材料的新方法。层倍增器单元对熔体的多重力场作用,为多相多组分体系形态的原位调控提供了可能。而通过两相交替层状排布形成的受限层空间和丰富的层界面不仅赋予了材料独特的力学、光电、阻隔等性能,还为聚合物结晶调控提供了理想的研究模型。本文简要综述了近年来在层倍增过程中聚合物的形态结构演变及其对相关性能影响方面的研究进展。

Recent Progress of Structural Development and Related Properties of Polymer Materials in Confined Layer Spaces

The layered structures widely existing in natural world such as shells or trees,often bring excellent performances or special features.As the application of biomimetic science in polymer processing field,micro/nanolayer coextrusion technology offers a new method to fabricate alternating multilayer polymers with good physical properties.By virtue of the special design of the flow channels,the polymeric melt would experience an iterative layer-multiplying process and be imposed by multiple stresses,which provides an opportunity to tailor the morphology and microstructure of polymer materials.Additionally,the confined layer spaces generated by the alternating multilayer structure not only endows excellent mechanical,optical,electrical and barrier properties,but also supplies an ideal model for researching polymer crystallization.This paper presents a review of the recent progress of structural development and related properties of polymer materials in confined layer spaces.