Citation: LI Fengkui, ZHU Wei, ZHANG Xian, ZHAO Chuntian, XU Mao. SHAPE MEMORY EFFECT OF SLIGHTLY-CROSSLINKED POLYETHYLENE*[J]. Chinese Journal of Polymer Science, ;1998, 16(2): 155-163. shu

SHAPE MEMORY EFFECT OF SLIGHTLY-CROSSLINKED POLYETHYLENE*

Received Date: 28 March 1997

A series of slightly crosslinked polyethylenes (SXLPE) was prepared by aone-step method using dicumyl peroxide as crosslinking agent in a Haake Mixer. The gelcontents 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 propertiesand shape recovery effect were systematically investigated in terms of the content of thecrosslinking 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.
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