SHAPE MEMORY EFFECT OF SLIGHTLY-CROSSLINKED POLYETHYLENE  

作　　者：李凤奎 祝巍 张贤 赵春田 徐懋 

机构地区：[1]Polymer Physics Laboratory, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Journal of Polymer Science》1998年第2期155-163,共9页高分子科学（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China and the Science Foundation of Polymer Physics Laboratory, Chinese Academy of Sciences.

摘　　要：A series of slightly crosslinked polyethylenes (SXLPE) was prepared by a one-step method using dicumyl peroxide as crosslinking agent in a Haake Mixer. The gel contents G (Soxhlet extracted) of the samples are in the range from 5% to 20% by weight. Their shear viscosity, crystallization and melting behavior, dynamic mechanical properties and shape recovery effect were systematically investigated in terms of the content of the crosslinking agent. It shows that under certain experimental conditions the SXLPE's may exhibit good shape fixation ability and shape memory properties, which are similar to those of the commercially available shape memory polyethylenes prepared by gamma-irradiation technique. However the shape memory behavior of these samples is not very stable due to their low crosslinking degree, or gel content. Thus their application is limited in special cases with fast strain fixing procedures. (Author abstract) 9 Refs.A series of slightly crosslinked polyethylenes (SXLPE) was prepared by a one-step method using dicumyl peroxide as crosslinking agent in a Haake Mixer. The gel contents G (Soxhlet extracted) of the samples are in the range from 5% to 20% by weight. Their shear viscosity, crystallization and melting behavior, dynamic mechanical properties and shape recovery effect were systematically investigated in terms of the content of the crosslinking agent. It shows that under certain experimental conditions the SXLPE's may exhibit good shape fixation ability and shape memory properties, which are similar to those of the commercially available shape memory polyethylenes prepared by gamma-irradiation technique. However the shape memory behavior of these samples is not very stable due to their low crosslinking degree, or gel content. Thus their application is limited in special cases with fast strain fixing procedures. (Author abstract) 9 Refs.

关 键 词：POLYETHYLENES degree of crosslinking shape memory behavior 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]