Shape recovery and irrecoverable strain control in polyurethane shape-memory polymer

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Shape recovery and irrecoverable strain control in polyurethane shape-memory polymer.

In shape-memory polymers, large strain can be fixed at a low temperature and thereafter recovered at a high temperature. If the shape-memory polymer is held at a high temperature for a long time, the irrecoverable strain can attain a new intermediate shape between the shape under the maximum stress and the primary shape. Irrecoverable strain control can be applied to the fabrication of a shape-...

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The thermomechanical properties of polyurethane shape memory polymer (SMP) foams were investigated experimentally. The results obtained can be summarized as follows. (1) By cooling the foam after compressive deformation at high temperature, stress decreases and the deformed shape is Ž xed. Stress decreases markedly in the region of temperature below the glass transition temperature Tg during th...

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ژورنال

عنوان ژورنال: Science and Technology of Advanced Materials

سال: 2008

ISSN: 1468-6996,1878-5514

DOI: 10.1088/1468-6996/9/1/015009