SHAPE MEMORY EFFECT OF SLIGHTLY-CROSSLINKED POLYETHYLENE

• 来源期刊: 高分子科学（英文版）
• 学科: 化学
• 年，卷（期）: 1998,（2）
• 页码范围: 155-163
• 页数: 9页
• 分类号: O6
• 语种: 英文

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.