| 摘要 |
The invention relates to a composite layer SV, comprising a shape memory composite that is provided with at least one shape memory layer F applied on a substrate S. The shape memory layer F is present as a martensite phase M and/or as an austenite phase A depending on the temperature T, and the composite SV has at least one polymer layer P from a polymer that has thermoplastic properties. At a first temperature T0, at which the shape memory layer F is in the martensite state M and at which the polymer P is in the solid state h, the stiffness of the polymer P is higher than the stiffness of the shape memory composite. At a second higher temperature T1, at which the shape memory layer F is in the austenite state A, and at which the polymer P has rubber-like properties w, the stiffness of the polymer P is smaller than the stiffness of the shape memory composite. The hysteresis loop that occurs when the shape memory layer is subjected to an increase in temperature WZ to the austenite state A or when the shape memory layer F is cooled to the martensite state M, has a breadth with respect to the temperature T within which the transition of the polymer layer P from the solid state h to the rubber-like state w can be found. |
