结晶高分子非晶区的结构及其动力学行为研究进展

非晶结构对结晶高分子材料结构和最终使用性能有非常重要的影响,但目前对半晶高分子中非晶结构的认识还不太清晰并且有待进一步完善.随着研究手段的发展,结晶高分子中非晶区结构及其动力学行为的研究受到越来越多的关注.本文简要概述了目前对结晶高分子中非晶相的研究进展,主要从结晶高分子中非晶区的结构﹑结晶高分子中非晶区的松弛行为﹑非晶相对结晶高分子性能的影响以及等温结晶过程中非晶相的结构演化这四个方面进行介绍,并对它们的研究现状进行了概述,同时指出了目前在这方面研究中存在的争议和问题.

PROGRESS IN STUDIES ON STRUCTURE AND RELAXATION BEHAVIOR OF THE AMORPHOUS PHASES IN CRYSTALLINE POLYMERS

The investigations on the structure and relaxation behavior of the amorphous phase are crucial for understanding the structure and property of crystalline polymers.In this review,we introduce the structures of the amorphous phase in crystalline polymers at first.Then,the effect of the morphology,molecular weight and crystallinity of the crystalline polymers on the relaxation behaviors of the amorphous phase in the crystalline polymers is described.The relaxation behaviors of the amorphous phase in crystalline polymers under confinement and in ultra-thin films are reviewed.The influence of extra force such as drawing,on the relaxation behaviors of the amorphous phase in the crystalline polymers is also discussed.As the amorphous phase plays an important role in the crystalline polymers,the effect of the amorphous phase on the mechanical properties and melting process of the crystalline polymers is discussed in detail in this review.At last,the structure evolution of the amorphous phase during the isothermal crystallization process of crystalline polymers is summarized.